Added GitHub workflow in lieu of Travis build.

Author: Bilge

.github/workflows/Tests.yaml

@@ -0,0 +1,51 @@
+name: Tests
+
+on:
+  push:
+  workflow_dispatch:
+
+jobs:
+  Test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        php:
+          - 8.1
+          - 8.2
+        dependencies:
+          - hi
+          - lo
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup PHP ${{ matrix.php }}
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          coverage: xdebug
+
+      - name: Validate composer.json
+        run: composer validate
+
+      - name: Cache dependencies
+        id: composer-cache
+        uses: actions/cache@v2
+        with:
+          path: vendor
+          key: php-${{ matrix.php }}-${{ matrix.dependencies }}-${{ hashFiles('composer.json') }}
+          restore-keys: php-${{ matrix.php }}-${{ matrix.dependencies }}-
+
+      - name: Install dependencies ${{ matrix.dependencies == 'lo' && '(lowest)' || '' }}
+        run: composer update --no-interaction --no-progress
+          ${{ matrix.dependencies == 'lo' && '--prefer-lowest' || '' }}
+
+      - name: Run test suite with coverage
+        run: composer test -- --coverage-clover=build/logs/clover.xml
+
+      - name: Upload test coverage
+        run: composer global require php-coveralls/php-coveralls && php-coveralls -v
+        env:
+          COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -1,3 +1,5 @@
 /vendor/
 /.*/
+!/.github/
 /composer.lock
+.phpunit.result.cache

.travis.yml

@@ -7,14 +7,15 @@ Retry
 [![Test coverage][Coverage image]][Coverage]
 [![Code style][Style image]][Style]
 
-Retry provides a function to retry failing operations. An operation is deemed to have failed if it throws an exception.
+Retry provides a function to retry failing operations with optional [Fiber][Fibers] support.
+An operation is deemed to have failed if it throws an exception.
 This library is a rewrite of [Igor Wiedler's retry](https://github.com/igorw/retry) but aims to remain faithful to the
 spirit of the original.
 
 Requirements
 ------------
 
-- [PHP 5.5](http://php.net/)
+- [PHP 8.1](http://php.net/)
 - [Composer](https://getcomposer.org/)
 
 Usage
@@ -49,12 +50,14 @@ $response = retry(5, function () use ($url) {
 ```
 
 
+  [Fibers]: https://www.php.net/manual/en/language.fibers.php
+
   [Releases]: https://github.com/ScriptFUSION/Retry/releases
   [Version image]: https://poser.pugx.org/scriptfusion/retry/v/stable "Latest version"
   [Downloads]: https://packagist.org/packages/scriptfusion/retry
   [Downloads image]: https://poser.pugx.org/scriptfusion/retry/downloads "Total downloads"
-  [Build]: http://travis-ci.org/ScriptFUSION/Retry
-  [Build image]: https://travis-ci.org/ScriptFUSION/Retry.svg "Build status"
+  [Build]: https://github.com/ScriptFUSION/Retry/actions/workflows/Tests.yaml
+  [Build image]: https://github.com/ScriptFUSION/Retry/actions/workflows/Tests.yaml/badge.svg "Build status"
   [Coverage]: https://coveralls.io/github/ScriptFUSION/Retry
   [Coverage image]: https://coveralls.io/repos/ScriptFUSION/Retry/badge.svg "Test coverage"
   [Style]: https://styleci.io/repos/62990558

README.md

@@ -17,7 +17,7 @@
   },
   "require-dev": {
     "amphp/amp": "^3-beta.9",
-    "phpunit/phpunit": "^8.5|^9",
+    "phpunit/phpunit": "^9.5",
     "revolt/event-loop": "^0.2"
   },
   "autoload": {