diff --git a/poetry.lock b/poetry.lock
index f5e1426..1768a04 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,118 +1,112 @@
 [[package]]
-category = "main"
-description = "Async http client/server framework (asyncio)"
 name = "aiohttp"
+version = "3.6.2"
+description = "Async http client/server framework (asyncio)"
+category = "main"
 optional = true
 python-versions = ">=3.5.3"
-version = "3.6.2"
 
 [package.dependencies]
 async-timeout = ">=3.0,<4.0"
 attrs = ">=17.3.0"
 chardet = ">=2.0,<4.0"
+idna-ssl = {version = ">=1.0", markers = "python_version < \"3.7\""}
 multidict = ">=4.5,<5.0"
+typing-extensions = {version = ">=3.6.5", markers = "python_version < \"3.7\""}
 yarl = ">=1.0,<2.0"
 
-[package.dependencies.idna-ssl]
-python = "<3.7"
-version = ">=1.0"
-
-[package.dependencies.typing-extensions]
-python = "<3.7"
-version = ">=3.6.5"
-
 [package.extras]
 speedups = ["aiodns", "brotlipy", "cchardet"]
 
 [[package]]
-category = "main"
-description = "Bash tab completion for argparse"
 name = "argcomplete"
+version = "1.12.0"
+description = "Bash tab completion for argparse"
+category = "main"
 optional = false
 python-versions = "*"
-version = "1.12.0"
 
 [package.dependencies]
-[package.dependencies.importlib-metadata]
-python = ">=3.6,<3.7"
-version = ">=0.23,<2"
+importlib-metadata = {version = ">=0.23,<2", markers = "python_version == \"3.6\" or python_version == \"3.7\""}
 
 [package.extras]
 test = ["coverage", "flake8", "pexpect", "wheel"]
 
 [[package]]
-category = "main"
-description = "Timeout context manager for asyncio programs"
 name = "async-timeout"
+version = "3.0.1"
+description = "Timeout context manager for asyncio programs"
+category = "main"
 optional = true
 python-versions = ">=3.5.3"
-version = "3.0.1"
 
 [[package]]
-category = "dev"
-description = "Atomic file writes."
-marker = "sys_platform == \"win32\""
 name = "atomicwrites"
+version = "1.4.0"
+description = "Atomic file writes."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.4.0"
 
 [[package]]
-category = "main"
-description = "Classes Without Boilerplate"
 name = "attrs"
+version = "19.3.0"
+description = "Classes Without Boilerplate"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "19.3.0"
 
 [package.extras]
-azure-pipelines = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "pytest-azurepipelines"]
-dev = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "sphinx", "pre-commit"]
+azure-pipelines = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "pytest-azurepipelines", "six", "zope.interface"]
+dev = ["coverage", "hypothesis", "pre-commit", "pympler", "pytest (>=4.3.0)", "six", "sphinx", "zope.interface"]
 docs = ["sphinx", "zope.interface"]
 tests = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
 
 [[package]]
-category = "main"
-description = "Python package for providing Mozilla's CA Bundle."
 name = "certifi"
+version = "2020.6.20"
+description = "Python package for providing Mozilla's CA Bundle."
+category = "main"
 optional = false
 python-versions = "*"
-version = "2020.6.20"
 
 [[package]]
-category = "main"
-description = "Universal encoding detector for Python 2 and 3"
 name = "chardet"
+version = "3.0.4"
+description = "Universal encoding detector for Python 2 and 3"
+category = "main"
 optional = true
 python-versions = "*"
-version = "3.0.4"
 
 [[package]]
-category = "main"
-description = "Cross-platform colored terminal text."
 name = "colorama"
+version = "0.4.3"
+description = "Cross-platform colored terminal text."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "0.4.3"
 
 [[package]]
-category = "dev"
-description = "Code coverage measurement for Python"
 name = "coverage"
+version = "5.2.1"
+description = "Code coverage measurement for Python"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
-version = "5.2.1"
+
+[package.dependencies]
+toml = {version = "*", optional = true, markers = "extra == \"toml\""}
 
 [package.extras]
 toml = ["toml"]
 
 [[package]]
-category = "main"
-description = "Python client for Elasticsearch"
 name = "elasticsearch"
+version = "7.8.1"
+description = "Python client for Elasticsearch"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, <4"
-version = "7.8.1"
 
 [package.dependencies]
 certifi = "*"
@@ -120,113 +114,109 @@ urllib3 = ">=1.21.1"
 
 [package.extras]
 async = ["aiohttp (>=3,<4)", "yarl"]
-develop = ["requests (>=2.0.0,<3.0.0)", "coverage", "mock", "pyyaml", "pytest", "pytest-cov", "sphinx (<1.7)", "sphinx-rtd-theme", "black", "jinja2"]
+develop = ["black", "coverage", "jinja2", "mock", "pytest", "pytest-cov", "pyyaml", "requests (>=2.0.0,<3.0.0)", "sphinx (<1.7)", "sphinx-rtd-theme"]
 docs = ["sphinx (<1.7)", "sphinx-rtd-theme"]
 requests = ["requests (>=2.4.0,<3.0.0)"]
 
 [[package]]
-category = "main"
-description = "Internationalized Domain Names in Applications (IDNA)"
 name = "idna"
+version = "2.10"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.10"
 
 [[package]]
-category = "main"
-description = "Patch ssl.match_hostname for Unicode(idna) domains support"
-marker = "python_version < \"3.7\""
 name = "idna-ssl"
+version = "1.1.0"
+description = "Patch ssl.match_hostname for Unicode(idna) domains support"
+category = "main"
 optional = true
 python-versions = "*"
-version = "1.1.0"
 
 [package.dependencies]
 idna = ">=2.0"
 
 [[package]]
-category = "main"
-description = "Read metadata from Python packages"
-marker = "python_version < \"3.8\""
 name = "importlib-metadata"
+version = "1.7.0"
+description = "Read metadata from Python packages"
+category = "main"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "1.7.0"
 
 [package.dependencies]
 zipp = ">=0.5"
 
 [package.extras]
-docs = ["sphinx", "rst.linker"]
-testing = ["packaging", "pep517", "importlib-resources (>=1.3)"]
+docs = ["rst.linker", "sphinx"]
+testing = ["importlib-resources (>=1.3)", "packaging", "pep517"]
 
 [[package]]
-category = "dev"
-description = "iniconfig: brain-dead simple config-ini parsing"
 name = "iniconfig"
+version = "1.0.1"
+description = "iniconfig: brain-dead simple config-ini parsing"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.0.1"
 
 [[package]]
-category = "dev"
-description = "More routines for operating on iterables, beyond itertools"
 name = "more-itertools"
+version = "8.4.0"
+description = "More routines for operating on iterables, beyond itertools"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "8.4.0"
 
 [[package]]
-category = "main"
-description = "multidict implementation"
 name = "multidict"
+version = "4.7.6"
+description = "multidict implementation"
+category = "main"
 optional = false
 python-versions = ">=3.5"
-version = "4.7.6"
 
 [[package]]
-category = "dev"
-description = "Core utilities for Python packages"
 name = "packaging"
+version = "20.4"
+description = "Core utilities for Python packages"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "20.4"
 
 [package.dependencies]
 pyparsing = ">=2.0.2"
 six = "*"
 
 [[package]]
-category = "dev"
-description = "plugin and hook calling mechanisms for python"
 name = "pluggy"
+version = "0.13.1"
+description = "plugin and hook calling mechanisms for python"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.13.1"
 
 [package.dependencies]
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.12"
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 
 [package.extras]
 dev = ["pre-commit", "tox"]
 
 [[package]]
-category = "dev"
-description = "library with cross-python path, ini-parsing, io, code, log facilities"
 name = "py"
+version = "1.9.0"
+description = "library with cross-python path, ini-parsing, io, code, log facilities"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.9.0"
 
 [[package]]
-category = "main"
-description = "A Python application framework - Let us handle the boring stuff!"
 name = "pyapp"
+version = "4.3.0"
+description = "A Python application framework - Let us handle the boring stuff!"
+category = "main"
 optional = false
 python-versions = ">=3.6"
-version = "4.3.0"
 
 [package.dependencies]
 argcomplete = "*"
@@ -234,29 +224,30 @@ colorama = "*"
 yarl = "*"
 
 [package.extras]
-dev = ["nox", "docutils (0.15.2)"]
+dev = ["docutils (==0.15.2)", "nox"]
 yaml = ["pyyaml"]
 
 [[package]]
-category = "dev"
-description = "Python parsing module"
 name = "pyparsing"
+version = "2.4.7"
+description = "Python parsing module"
+category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "2.4.7"
 
 [[package]]
-category = "dev"
-description = "pytest: simple powerful testing with Python"
 name = "pytest"
+version = "6.0.1"
+description = "pytest: simple powerful testing with Python"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "6.0.1"
 
 [package.dependencies]
-atomicwrites = ">=1.0"
+atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
 attrs = ">=17.4.0"
-colorama = "*"
+colorama = {version = "*", markers = "sys_platform == \"win32\""}
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 iniconfig = "*"
 more-itertools = ">=4.0.0"
 packaging = "*"
@@ -264,21 +255,17 @@ pluggy = ">=0.12,<1.0"
 py = ">=1.8.2"
 toml = "*"
 
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.12"
-
 [package.extras]
-checkqa_mypy = ["mypy (0.780)"]
+checkqa_mypy = ["mypy (==0.780)"]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
 [[package]]
-category = "dev"
-description = "Pytest support for asyncio."
 name = "pytest-asyncio"
+version = "0.14.0"
+description = "Pytest support for asyncio."
+category = "dev"
 optional = false
 python-versions = ">= 3.5"
-version = "0.14.0"
 
 [package.dependencies]
 pytest = ">=5.4.0"
@@ -287,93 +274,89 @@ pytest = ">=5.4.0"
 testing = ["async-generator (>=1.3)", "coverage", "hypothesis (>=5.7.1)"]
 
 [[package]]
-category = "dev"
-description = "Pytest plugin for measuring coverage."
 name = "pytest-cov"
+version = "4.0.0"
+description = "Pytest plugin for measuring coverage."
+category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.10.0"
+python-versions = ">=3.6"
 
 [package.dependencies]
-coverage = ">=4.4"
+coverage = {version = ">=5.2.1", extras = ["toml"]}
 pytest = ">=4.6"
 
 [package.extras]
-testing = ["fields", "hunter", "process-tests (2.0.2)", "six", "pytest-xdist", "virtualenv"]
+testing = ["fields", "hunter", "process-tests", "pytest-xdist", "six", "virtualenv"]
 
 [[package]]
-category = "dev"
-description = "Python 2 and 3 compatibility utilities"
 name = "six"
+version = "1.15.0"
+description = "Python 2 and 3 compatibility utilities"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "1.15.0"
 
 [[package]]
-category = "dev"
-description = "Python Library for Tom's Obvious, Minimal Language"
 name = "toml"
+version = "0.10.1"
+description = "Python Library for Tom's Obvious, Minimal Language"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.10.1"
 
 [[package]]
-category = "main"
-description = "Backported and Experimental Type Hints for Python 3.5+"
-marker = "python_version < \"3.8\""
 name = "typing-extensions"
+version = "3.7.4.2"
+description = "Backported and Experimental Type Hints for Python 3.5+"
+category = "main"
 optional = false
 python-versions = "*"
-version = "3.7.4.2"
 
 [[package]]
-category = "main"
-description = "HTTP library with thread-safe connection pooling, file post, and more."
 name = "urllib3"
+version = "1.25.10"
+description = "HTTP library with thread-safe connection pooling, file post, and more."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
-version = "1.25.10"
 
 [package.extras]
 brotli = ["brotlipy (>=0.6.0)"]
-secure = ["certifi", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "pyOpenSSL (>=0.14)", "ipaddress"]
-socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7,<2.0)"]
+secure = ["certifi", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "ipaddress", "pyOpenSSL (>=0.14)"]
+socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
 
 [[package]]
-category = "main"
-description = "Yet another URL library"
 name = "yarl"
+version = "1.5.1"
+description = "Yet another URL library"
+category = "main"
 optional = false
 python-versions = ">=3.5"
-version = "1.5.1"
 
 [package.dependencies]
 idna = ">=2.0"
 multidict = ">=4.0"
-
-[package.dependencies.typing-extensions]
-python = "<3.8"
-version = ">=3.7.4"
+typing-extensions = {version = ">=3.7.4", markers = "python_version < \"3.8\""}
 
 [[package]]
-category = "main"
-description = "Backport of pathlib-compatible object wrapper for zip files"
-marker = "python_version < \"3.8\""
 name = "zipp"
+version = "3.1.0"
+description = "Backport of pathlib-compatible object wrapper for zip files"
+category = "main"
 optional = false
 python-versions = ">=3.6"
-version = "3.1.0"
 
 [package.extras]
-docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
-testing = ["jaraco.itertools", "func-timeout"]
+docs = ["jaraco.packaging (>=3.2)", "rst.linker (>=1.9)", "sphinx"]
+testing = ["func-timeout", "jaraco.itertools"]
 
 [extras]
 async = ["aiohttp"]
 
 [metadata]
-content-hash = "8447e4acc4bfd11182d1943e4b6da74aece334703c632bd9327a60b1025a9c4e"
+lock-version = "1.1"
 python-versions = "^3.6"
+content-hash = "0e11069b90748485303c3959a1d69e23232b83092cfa626ecdeb54b563f39760"
 
 [metadata.files]
 aiohttp = [
@@ -525,8 +508,8 @@ pytest-asyncio = [
     {file = "pytest_asyncio-0.14.0-py3-none-any.whl", hash = "sha256:2eae1e34f6c68fc0a9dc12d4bea190483843ff4708d24277c41568d6b6044f1d"},
 ]
 pytest-cov = [
-    {file = "pytest-cov-2.10.0.tar.gz", hash = "sha256:1a629dc9f48e53512fcbfda6b07de490c374b0c83c55ff7a1720b3fccff0ac87"},
-    {file = "pytest_cov-2.10.0-py2.py3-none-any.whl", hash = "sha256:6e6d18092dce6fad667cd7020deed816f858ad3b49d5b5e2b1cc1c97a4dba65c"},
+    {file = "pytest-cov-4.0.0.tar.gz", hash = "sha256:996b79efde6433cdbd0088872dbc5fb3ed7fe1578b68cdbba634f14bb8dd0470"},
+    {file = "pytest_cov-4.0.0-py3-none-any.whl", hash = "sha256:2feb1b751d66a8bd934e5edfa2e961d11309dc37b73b0eabe73b5945fee20f6b"},
 ]
 six = [
     {file = "six-1.15.0-py2.py3-none-any.whl", hash = "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"},
diff --git a/pyproject.toml b/pyproject.toml
index 953875d..2beda4c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,7 +40,7 @@ aiohttp = { version = "^3.6.0", optional = true}
 [tool.poetry.dev-dependencies]
 pytest = "^6.0"
 pytest-asyncio = "^0.14.0"
-pytest-cov = "^2.10.0"
+pytest-cov = "^4.0.0"
 
 [tool.poetry.extras]
 async = ["aiohttp"]