Migrate to GitHub actions (#42)

Author: mikefrancis

.github/workflows/main.yml

@@ -0,0 +1,37 @@
+# This is a basic workflow to help you get started with Actions
+
+name: CI
+
+# Controls when the action will run. 
+on:
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+
+      - name: Composer install
+        run: composer install --no-interaction
+
+      # Runs a single command using the runners shell
+      - name: Lint
+        run: ./vendor/bin/phpcs config src tests --standard=psr2
+
+      # Runs a set of commands using the runners shell
+      - name: Test
+        run: ./vendor/bin/phpunit --coverage-clover=coverage.xml

.travis.yml

@@ -10,14 +10,13 @@
         }
     ],
     "require": {
-        "php": "7.x",
         "aidantwoods/secureheaders": "^2.0",
         "illuminate/contracts": ">=5.4",
         "illuminate/http": ">=5.4",
         "illuminate/support": ">=5.4"
     },
     "require-dev": {
-        "phpunit/phpunit": "^6.2",
+        "phpunit/phpunit": "^8.3",
         "squizlabs/php_codesniffer": "^3.5"
     },
     "autoload": {