chore(ci): Use GitHub Actions instead of Travis (#7)

* chore(ci): Use GitHub Actions instead of Travis

* fix(ci): Remove ini-values and simplexml extension

* fix(ci): Run also on push to major version branches

Author: meyfa

.github/workflows/main.yml

@@ -0,0 +1,39 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+      - v*.x
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php-versions: ['7.3', '7.4', '8']
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup PHP ${{ matrix.php-versions }}
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-versions }}
+          extensions: gd
+          coverage: none
+
+      - name: Cache Composer packages
+        id: composer-cache
+        uses: actions/cache@v2
+        with:
+          path: vendor
+          key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-php-
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-progress
+
+      - name: Run test suite
+        run: vendor/bin/phpunit

.gitignore

@@ -1,4 +1,5 @@
+.DS_Store
 vendor/
 .idea
 .phpunit.result.cache
-composer.lock
+composer.lock

.travis.yml

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2018 Fabian Meyer
+Copyright (c) 2018 - 2022 Fabian Meyer
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

LICENSE

@@ -1,6 +1,6 @@
 # AssertGD for PHPUnit
 
-[![Build Status](https://travis-ci.com/meyfa/phpunit-assert-gd.svg?branch=master)](https://travis-ci.com/meyfa/phpunit-assert-gd)
+[![CI](https://github.com/meyfa/phpunit-assert-gd/actions/workflows/main.yml/badge.svg)](https://github.com/meyfa/phpunit-assert-gd/actions/workflows/main.yml)
 
 Trying to assert images with PHPUnit? This project provides a constraint and the
 required assertions that allow you do to so.