Use github actions

Author: Riimu

.github/workflows/main.yml

@@ -0,0 +1,39 @@
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+  workflow_dispatch:
+
+jobs:
+  tests:
+    strategy:
+      matrix:
+        operating-system: ubuntu-latest
+        php-versions: ['5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0']
+    runs-on: ${{ matrix.operating-system }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Setup PHP, with composer and extensions
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-versions }}
+          coverage: none
+      - name: Get composer cache directory
+        id: composer-cache
+        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+      - name: Cache composer dependencies
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
+          restore-keys: ${{ runner.os }}-composer-
+      - name: Install dependencies
+        run: composer install --no-progress --prefer-dist --classmap-authoritative --no-interaction
+      - name: Setup problem matchers for PHPUnit
+        run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
+      - name: Test with phpunit
+        run: vendor/bin/phpunit

.gitignore

@@ -1,3 +1,4 @@
 build/
 vendor/
+.phpunit.result.cache
 composer.lock

.travis.yml

@@ -22,7 +22,7 @@
     "psr/http-message": "^1.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "^5.7 || ^6.5"
+    "phpunit/phpunit": "^5.7 || ^6.5 || ^9.4"
   },
   "autoload": {
     "psr-4": {