Switch from Travis to GitHub actions for testing

.editorconfig

@@ -10,4 +10,7 @@ trim_trailing_whitespace = true
 
 [*.md]
 trim_trailing_whitespace = false
-insert_final_newline = false
+insert_final_newline = false
+
+[*.yml]
+insert_final_newline = false

.github/workflows/tests.yml

@@ -0,0 +1,34 @@
+name: PHPUnit tests
+
+on:
+  push:
+    branches:
+        main
+  pull_request:
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: true
+      matrix:
+        php: [7.4, 8.0, 8.1]
+
+    name: Tests on PHP ${{ matrix.php }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          tools: composer:v2
+          coverage: none
+
+      - name: Install dependencies
+        run: composer update --prefer-source --no-interaction --no-progress
+
+      - name: Execute tests
+        run: vendor/bin/phpunit --verbose

README.md

@@ -56,7 +56,4 @@ Run tests with `composer test` and run static analyis with `composer phpstan`.
 
 ## Roadmap
 
-- [ ] Add changelog
-- [ ] Add contributing information
-- [x] Add support for email addresses using player names
 - [ ] Add support for team/player relationships (getting a list of all players on a particular team, getting a player's teammates, etc.)