enhancement: Migrate CI from Travis to Github Action

.github/workflows/ci.yml

@@ -0,0 +1,35 @@
+name: Application CI
+
+on: pull_request
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    name: PHP CI ${{ matrix.php-versions }}
+    strategy:
+      matrix:
+        php-versions:
+          - 7.4
+          - 8.0
+          - 8.1
+          - 8.2
+          - 8.3
+
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-versions }}
+          tools: composer:v2
+      - name: Install dependencies
+        run: composer install --no-interaction --no-progress
+      - name: Run unit tests
+        run: vendor/phpunit/phpunit/phpunit --fail-on-warning

.gitignore

@@ -1,3 +1,5 @@
 .idea
 vendor
-build
+build
+composer.lock
+.phpunit.result.cache

composer.json

@@ -1,14 +1,17 @@
 {
     "name": "fulll/qbo-wrapper",
     "description": "Quickbooks online API wrapper",
+    "type": "library",
     "license": "MIT",
+    "minimum-stability": "stable",
+    "prefer-stable": true,
     "require": {
-        "php": ">=5.4.0",
+        "php": ">=7.4",
         "league/oauth1-client": "~1.0",
         "guzzle/guzzle": "~3.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "4.8.*"
+        "phpunit/phpunit": "^9.6"
     },
     "keywords": [
         "oauth",