Switch from Travis-CI to GitHub Actions (#20)

.github/workflows/ci.yml

@@ -0,0 +1,29 @@
+---
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php-version: ['5.6', '7.0', '7.1', '7.2', '7.3', '7.4']
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up PHP ${{ matrix.php-version }}
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-version }}
+          extensions: sqlite
+          ini-values: include_path=.:/usr/share/php
+      - name: Run tests
+        run: |
+          pear run-tests -d tests/