ci: migrate to GitHub Actions (#387)

* Add CI workflow using GitHub Actions

* Replace CI badges

- Travis CI badge with GitHub Actions CI badge
- coveralls badge with codecov badge

* Remove Travis CI settings

* Restrict permissions on CI workflow for security

* Pass `TERM` environment variable on running tests in CI

.github/workflows/ci.yml

@@ -0,0 +1,37 @@
+name: CI
+
+on: [push, pull_request]
+
+env:
+  PYTEST_ADDOPTS: "--cov-report=xml --color=yes"
+  TOX_TESTENV_PASSENV: 'TERM'
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        python: ['3.10', '3.9', '3.8']
+        include:
+          - python: '3.10'
+            toxenv: py310-cov
+          - python: '3.9'
+            toxenv: py39-cov
+          - python: '3.8'
+            toxenv: py38-cov
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '${{ matrix.python }}'
+      - run: pip install tox
+      - run: tox
+        env:
+          TOXENV: '${{ matrix.toxenv }}'
+          TERM: xterm
+      - uses: codecov/codecov-action@v3
+        with:
+          files: coverage.xml

README.rst

@@ -216,10 +216,10 @@ Acknowledgement
    :target: https://pypi.python.org/pypi/vim-vint/
 .. |Supported Python implementations| image:: https://img.shields.io/pypi/implementation/vim-vint.svg
    :target: https://pypi.python.org/pypi/vim-vint/
-.. |Build Status| image:: https://travis-ci.org/Vimjas/vint.svg?branch=master
-   :target: https://travis-ci.org/Vimjas/vint
-.. |Coverage Status| image:: https://img.shields.io/coveralls/Kuniwak/vint.svg
-   :target: https://coveralls.io/r/Kuniwak/vint
+.. |Build Status| image:: https://github.com/Vimjas/vint/actions/workflows/ci.yml/badge.svg
+   :target: https://github.com/Vimjas/vint/actions/workflows/ci.yml
+.. |Coverage Status| image:: https://codecov.io/gh/Vimjas/vint/branch/master/graph/badge.svg
+   :target: https://app.codecov.io/gh/Vimjas/vint
 .. |Code Health| image:: https://landscape.io/github/Kuniwak/vint/master/landscape.png
    :target: https://landscape.io/github/Kuniwak/vint/master
 .. |Dependency Status| image:: https://gemnasium.com/Kuniwak/vint.svg