chore: use github-action instead of travis for running tests

Author: softvar

.github/workflows/test.yml

@@ -0,0 +1,35 @@
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    if: "!contains(toJSON(github.event.commits.*.message), '[skip-ci]')"
+    name: Test on python ${{ matrix.python-version }} and ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-20.04
+        python-version: [ 2.7, 3.5, 3.6.7, 3.6.10, 3.6.14, 3.7.5, 3.7.11, 3.8.0, 3.8.5, 3.9.0, 3.9.6, 3.9.18, 3.10.13, 3.11.6]
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Use Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python-version }}
+        cache: 'pip'
+
+    - name: Install packages
+      run: |
+        python -m pip install --upgrade pip
+        if [ -f requirements-ci.txt ]; then pip install -r requirements-ci.txt; fi
+
+    - name: Run tests
+      run: coverage run --source=json2html setup.py test

.travis.yml

@@ -0,0 +1 @@
+ coverage==4.5.4