github actions added

Author: s3b4stian

.github/workflows/tests.yml

@@ -0,0 +1,35 @@
+name: Tests
+
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: '0 0 * * *'
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: true
+      matrix:
+        php: [7.1, 7.2, 7.3, 7.4]
+
+    name: PHP ${{ matrix.php }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          tools: composer:v2
+          coverage: xdebug
+
+      - name: Install dependencies
+        run: composer install
+
+      - name: Execute tests
+        run: vendor/bin/phpunit --verbose

.gitignore

@@ -3,3 +3,4 @@ composer.lock
 clover.xml
 infection-log.txt
 vendor/
+.phpunit.result.cache

composer.json

@@ -15,7 +15,7 @@
         "issues": "https://github.com/linna/typed-array/issues"
     },
     "require": {
-        "php": "^7.1"
+        "php": ">=7.1"
     },
     "require-dev": {
         "infection/infection": "^0.10",