chore: bump minimum support to Python 3.6

Author: tomasroy-ibm

.github/ISSUE_TEMPLATE/bug_report.md

@@ -21,7 +21,7 @@ If applicable, add screenshots to help explain your problem.
 
 **Must gather (please complete the following information):**
  - SDK Version [e.g. 1.2.1]
- - Python Version [e.g. 3.5]
+ - Python Version [e.g. 3.6]
  - Name of service that you're trying to use (if applicable)
  - Name of operation that you're trying to invoke (if applicable)
 

.travis.yml

@@ -36,27 +36,26 @@ script:
 - pytest test
 - ./test-integration.sh
 
-# To enable semantic-release, uncomment these sections.
 # before_deploy:
 # - pip install bump2version
 # - nvm install 12
 # - npm install @semantic-release/changelog
 # - npm install @semantic-release/exec
 # - npm install @semantic-release/git
 # - npm install @semantic-release/github
-# 
+
 # deploy:
 # - provider: script
 #   script: npx semantic-release
 #   skip_cleanup: true
 #   on:
-#     python: '3.5'
+#     python: '3.6'
 #     branch: master
 # - provider: pypi
 #   user: __token__
 #   password: $PYPI_TOKEN
 #   repository: https://upload.pypi.org/legacy
 #   skip_cleanup: true
 #   on:
-#     python: '3.5'
+#     python: '3.6'
 #     tags: true

setup.py

@@ -78,7 +78,6 @@ def finalize_options(self):
       classifiers=[
           'Programming Language :: Python',
           'Programming Language :: Python :: 3',
-          'Programming Language :: Python :: 3.5',
           'Programming Language :: Python :: 3.6',
           'Programming Language :: Python :: 3.7',
           'Programming Language :: Python :: 3.8',

tox.ini

@@ -1,8 +1,8 @@
 [tox]
-envlist = py35-lint, py35, py36, py37, py38
+envlist = py37-lint, py36, py37, py38, py39
 
-[testenv:py35-lint]
-basepython = python3.5
+[testenv:py37-lint]
+basepython = python3.7
 deps = pylint
 commands = pylint --rcfile=.pylintrc ibm_code_engine_sdk test