Migrate to pallets-sphinx-themes

Closes #261

Author: vimalloc

docs/conf.py

@@ -34,6 +34,7 @@
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
+    'pallets_sphinx_themes',
     'sphinx.ext.autodoc',
     'sphinx.ext.intersphinx',
     'sphinx.ext.ifconfig',

requirements.txt

@@ -1,35 +1,43 @@
 alabaster==0.7.12
 asn1crypto==0.24.0
-Babel==2.6.0
-certifi==2018.11.29
-cffi==1.11.5
+attrs==19.1.0
+Babel==2.7.0
+certifi==2019.6.16
+cffi==1.12.3
 chardet==3.0.4
 Click==7.0
-cryptography==2.4.2
-docutils==0.14
-filelock==3.0.10
-Flask==1.0.2
-Flask-Sphinx-Themes==1.0.2
+cryptography==2.7
+docutils==0.15.2
+filelock==3.0.12
+Flask==1.1.1
 idna==2.8
 imagesize==1.1.0
+importlib-metadata==0.19
 itsdangerous==1.1.0
-Jinja2==2.10
-MarkupSafe==1.1.0
-packaging==18.0
-pluggy==0.8.0
-py==1.7.0
+Jinja2==2.10.1
+MarkupSafe==1.1.1
+packaging==19.1
+Pallets-Sphinx-Themes==1.2.1
+pluggy==0.12.0
+py==1.8.0
 pycparser==2.19
-Pygments==2.3.1
+Pygments==2.4.2
 PyJWT==1.7.1
-pyparsing==2.3.0
-pytz==2018.7
-requests==2.21.0
+pyparsing==2.4.2
+pytz==2019.2
+requests==2.22.0
 six==1.12.0
-snowballstemmer==1.2.1
-Sphinx==1.8.3
-sphinxcontrib-websupport==1.1.0
+snowballstemmer==1.9.0
+Sphinx==2.1.2
+sphinxcontrib-applehelp==1.0.1
+sphinxcontrib-devhelp==1.0.1
+sphinxcontrib-htmlhelp==1.0.2
+sphinxcontrib-jsmath==1.0.1
+sphinxcontrib-qthelp==1.0.2
+sphinxcontrib-serializinghtml==1.1.3
 toml==0.10.0
-tox==3.6.1
-urllib3==1.24.1
-virtualenv==16.2.0
-Werkzeug==0.14.1
+tox==3.13.2
+urllib3==1.25.3
+virtualenv==16.7.2
+Werkzeug==0.15.5
+zipp==0.5.2