use GitHub Actions instead of Travis CI

.github/workflows/ci.yml

@@ -0,0 +1,28 @@
+
+name: CI
+on: [push, pull_request]
+
+permissions:
+  contents: read #  to fetch code (actions/checkout)
+
+jobs:
+    tests:
+        name: Tests
+        timeout-minutes: 10
+        runs-on: ${{ matrix.os }}
+        steps:
+            -   name: Checkout
+                uses: actions/checkout@v3
+            -   name: Setup PHP
+                uses: shivammathur/setup-php@v2
+                with:
+                    php-version: ${{ matrix.php-version }}
+            -   name: Composer Install
+                run: composer install --no-interaction --no-cache
+            -   name: PHPUnit
+                run: vendor/bin/phpunit
+        strategy:
+            fail-fast: false
+            matrix:
+                os: [ubuntu-latest, windows-latest, macos-latest]
+                php-version: ['5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3']

README.md

@@ -1,6 +1,6 @@
 # mcrypt_compat
 
-[![Build Status](https://travis-ci.org/phpseclib/mcrypt_compat.svg?branch=master)](https://app.travis-ci.com/github/phpseclib/mcrypt_compat)
+[![CI Status](https://github.com/phpseclib/mcrypt_compat/actions/workflows/ci.yml/badge.svg?branch=1.0&event=push "CI Status")](https://github.com/phpseclib/mcrypt_compat/actions/workflows/ci.yml?query=branch%3A1.0)
 
 PHP 5.x-8.x polyfill for mcrypt extension.