Switch to GitHub Actions (#293)

.gitattributes

@@ -1,6 +1,6 @@
 /.gitattributes export-ignore
+/.github export-ignore
 /.gitignore export-ignore
-/.travis.yml export-ignore
 /art export-ignore
 /benchmarks export-ignore
 /configdoc export-ignore

.github/workflows/ci.yml

@@ -0,0 +1,35 @@
+name: ci
+
+on:
+  push:
+    branches:
+      - "master"
+  pull_request:
+
+jobs:
+  linux_tests:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: true
+      matrix:
+        php: [5.4, 5.5, 5.6, 7.0, 7.1, 7.2, 7.3, 7.4]
+
+    name: PHP ${{ matrix.php }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+
+      - name: Clone simpletest
+        run: git clone --depth=50 https://github.com/ezyang/simpletest.git
+
+      - name: Configure simpletest
+        run: cp test-settings.travis.php test-settings.php
+
+      - name: Execute Unit tests
+        run: php tests/index.php

.travis.yml

@@ -1,19 +0,0 @@
-language: php
-php:
-    - '5.6'
-    - '7.0'
-    - '7.1'
-    - '7.2'
-    - '7.3'
-    - '7.4'
-matrix:
-    include:
-        - php: '5.4'
-          dist: trusty
-        - php: '5.5'
-          dist: trusty
-before_script:
-    - git clone --depth=50 https://github.com/ezyang/simpletest.git
-    - cp test-settings.travis.php test-settings.php
-script:
-    - php tests/index.php