Add Python 3.9 support

This PR includes:
- Add python 3.9 support
- Add descriptions to GitHub CI workflows

.github/workflows/addon-check.yml

@@ -1,3 +1,6 @@
+# This workflow performs the required add-on checks for a submission
+# to the official Kodi repository
+
 name: Addon checker
 on:
 - pull_request

.github/workflows/ci.yml

@@ -1,3 +1,7 @@
+# This workflow performs the various sanity tests, integration tests and
+# may run parts of the add-on and add-on service to get a better testing
+# coverage. It also runs Codecov and SonarCloud actions.
+
 name: CI
 on:
 - pull_request
@@ -12,7 +16,7 @@ jobs:
  strategy:
  fail-fast: false
  matrix:
- python-version: [ 2.7, 3.5, 3.6, 3.7, 3.8 ]
+ python-version: [ 2.7, 3.5, 3.6, 3.7, 3.8, 3.9 ]
  steps:
  - name: Check out ${{ github.sha }} from repository ${{ github.repository }}
  uses: actions/checkout@v2

.github/workflows/release.yml

@@ -1,3 +1,6 @@
+# This workflow performs an automated release to GitHub and to the official
+# Kodi repository, for a pre-Matrix and a post-Matrix release.
+
 name: Release
 on:
  push:
@@ -73,4 +76,4 @@ jobs:
  env:
  GH_USERNAME: ${{secrets.GH_USERNAME}}
  GH_TOKEN: ${{secrets.GH_TOKEN}}
- EMAIL: ${{secrets.EMAIL}}
+ EMAIL: ${{secrets.EMAIL}}

.github/workflows/status.yml

@@ -1,3 +1,7 @@
+# This workflow performs status checks to identify broken code paths due to
+# backend changes. It could test authentication, resumepoints, search, suggest,
+# TV guide, webscrapers and reporting new Android app releases.
+
 name: Status
 on:
  pull_request:
@@ -22,3 +26,6 @@ jobs:
  run: |
  python -m pip install --upgrade pip
  pip install -r requirements.txt
+# - name: TEST IPTV Manager EPG
+# run: python -m unittest -v test_iptvmanager.TestIPTVManager.test_get_iptv_epg
+# if: always()

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py35,py36,py37,py38,flake8
+envlist = py27,py35,py36,py37,py38,py39,flake8
 skipsdist = True
 skip_missing_interpreters = True