GitHub actions (#109)

Add github actions

.github/workflows/phpunit.yml

@@ -0,0 +1,23 @@
+name: PHPUnit
+
+on: [push, pull_request]
+
+jobs:
+  test:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php: [5.6, 7.0, 7.1, 7.2, 7.3]
+
+    steps:
+    - uses: actions/checkout@v1
+
+    - name: Validate composer.json and composer.lock
+      run: composer validate
+
+    - name: Install dependencies
+      run: composer install --prefer-dist --no-progress --no-suggest --no-interaction
+
+    - name: Run test suite
+      run: vendor/bin/phpunit

README.md

@@ -6,6 +6,7 @@
 [![License](https://poser.pugx.org/tucker-eric/eloquentfilter/license)](https://packagist.org/packages/tucker-eric/eloquentfilter)
 [![StyleCI](https://styleci.io/repos/53163405/shield)](https://styleci.io/repos/53163405/)
 [![Build Status](https://travis-ci.org/Tucker-Eric/EloquentFilter.svg?branch=master)](https://travis-ci.org/Tucker-Eric/EloquentFilter)
+![PHPUnit Status](https://github.com/Tucker-Eric/EloquentFilter/workflows/PHPUnit/badge.svg?branch=master)
 
 An Eloquent way to filter Eloquent Models and their relationships