chore: simplify travis setup, for now

.travis.yml

@@ -1,72 +1,11 @@
 # Config file for automatic testing at travis-ci.com
 
 language: python
-# ===== Linux ======
-os: linux
-dist: bionic
 python:
-  - 3.6
-  - 3.7
-  - 3.8
   - 3.9
-
-jobs:
-  include:
-    # ======= OSX ========
-#     ----- changes in Travis images means this doesn't work for versions before 3.7.5 ---
-#     - name: "Python 3.6.5 on macOS 10.13"
-#       os: osx
-#       osx_image: xcode9.4  # Python 3.6.5 running on macOS 10.13
-#       language: shell      # 'language: python' is an error on Travis CI macOS
-#       script: tox
-#       after_success: python3 -m codecov
-    - name: "Python 3.7.9 on macOS 10.14"
-      os: osx
-      osx_image: xcode10.2  # Python 3.7.5 running on macOS 10.14.3
-      language: shell       # 'language: python' is an error on Travis CI macOS
-      script: tox
-      after_success: python3 -m codecov
-    - name: "Python 3.8.0 on macOS 10.14"
-      os: osx
-      osx_image: xcode11.3  # Python 3.8.0 running on macOS 10.14.6
-      language: shell       # 'language: python' is an error on Travis CI macOS
-      script: tox
-      after_success: python3 -m codecov
-    - name: "Python 3.9.0 on macOS 10.14"
-      os: osx
-      osx_image: xcode12.4  # Python 3.9.0 running on macOS 11.2.1
-      language: shell       # 'language: python' is an error on Travis CI macOS
-      script: tox
-      after_success: python3 -m codecov
-    #  ====== WINDOWS =========
-    - name: "Python 3.6.8 on Windows"
-      os: windows           # Windows 10.0.17134 N/A Build 17134
-      language: shell       # 'language: python' is an error on Travis CI Windows
-      before_install:
-        - choco install python --version 3.6.8
-        - python --version
-      env: PATH=/c/Python36:/c/Python36/Scripts:$PATH
-    - name: "Python 3.7.9 on Windows"
-      os: windows           # Windows 10.0.17134 N/A Build 17134
-      language: shell       # 'language: python' is an error on Travis CI Windows
-      before_install:
-        - choco install python --version 3.7.9
-        - python --version
-      env: PATH=/c/Python37:/c/Python37/Scripts:$PATH
-    - name: "Python 3.8.8 on Windows"
-      os: windows           # Windows 10.0.17134 N/A Build 17134
-      language: shell       # 'language: python' is an error on Travis CI Windows
-      before_install:
-        - choco install python --version 3.8.8
-        - python --version
-      env: PATH=/c/Python38:/c/Python38/Scripts:$PATH
-    - name: "Python 3.9.2 on Windows"
-      os: windows           # Windows 10.0.17134 N/A Build 17134
-      language: shell       # 'language: python' is an error on Travis CI Windows
-      before_install:
-        - choco install python --version 3.9.2
-        - python --version
-      env: PATH=/c/Python39:/c/Python39/Scripts:$PATH
+  - 3.8
+  - 3.7
+  - 3.6
 
 # Command to install dependencies, e.g. pip install -r requirements.txt --use-mirrors
 install: pip install -U tox-travis

README.md

@@ -52,7 +52,7 @@ If you're looking for powerful, _general purpose badge generation tools_ for you
 
 - automatically generates your project's coverage badge using the [shields.io](https://shields.io/) service, and then updates your project's README with the newly generated badge
 - simple CLI tool (`readme-cov`) with helpful messages
-- comprehensively tested on python 3.6 to 3.9 on GNU/Linux, Mac OS X and Windows, with coverage ≥ 84%
+- tested on python 3.6 to 3.9 with coverage ≥ 84%
 - free software: BSD-3-Clause license
 - generates different colours depending on the coverage percentage. Optionally generate plain colour (green) regardless of percentage
 - minimal external dependencies – this tool only has 2 external dependencies; [Coverage.py](https://github.com/nedbat/coveragepy) (obviously!) and [colorama](https://github.com/tartley/colorama) (for cross-platform coloured terminal output)
@@ -157,6 +157,7 @@ Please give a ⭐️ if this project helped you!
 ## ✅ TODO
 
 - [ ] Add a screenshot / demo in this README
+- [ ] improve CI/CD to cater for GNU/Linux, Mac OS X and Windows
 - [ ] Make the codebase fully typed
 - [ ] Improve the Tests by [parametrizing](https://docs.pytest.org/en/stable/example/parametrize.html) fixtures and test functions
 - [ ] Cater for both markdown and restructuredtext, and detect which is which if no extension given