chore: adds GHA.

.github/workflows/ci.yml

@@ -0,0 +1,44 @@
+name: Build
+on:
+  push:
+    branches:
+      - master
+    paths-ignore:
+      - "**/*.md"
+      - "LICENSE"
+  pull_request:
+jobs:
+  test:
+    name: OpenTracing (PHP version ${{ matrix.php-versions }} on ${{ matrix.operating-system }})
+    runs-on: ${{ matrix.operating-system }}
+    strategy:
+      fail-fast: false
+      matrix:
+        operating-system: [ubuntu-latest, windows-latest, macos-latest]
+        php-versions: ["7.1", "7.2", "7.3", "7.4", "8.0", "8.1"]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Setup PHP, with composer and extensions
+        uses: shivammathur/setup-php@v2 #https://github.com/shivammathur/setup-php
+        with:
+          php-version: ${{ matrix.php-versions }}
+      - name: Get composer cache directory
+        id: composer-cache
+        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+      - name: Cache composer dependencies
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
+          restore-keys: ${{ runner.os }}-composer-
+      - name: Install Composer dependencies
+        run: |
+          composer install --no-progress --prefer-dist --optimize-autoloader
+      - name: Run lint
+        if: matrix.operating-system != 'windows-latest'
+        run: composer lint
+      - name: Run static check
+        run: composer static-check
+      - name: Run tests
+        run: composer test

README.md

@@ -1,6 +1,6 @@
 # OpenTracing API for PHP
 
-[![Build Status](https://travis-ci.org/opentracing/opentracing-php.svg?branch=master)](https://travis-ci.org/opentracing/opentracing-php)
+[![Build](https://github.com/opentracing/opentracing-php/actions/workflows/ci.yml/badge.svg)](https://github.com/opentracing/opentracing-php/actions/workflows/ci.yml)
 [![OpenTracing Badge](https://img.shields.io/badge/OpenTracing-enabled-blue.svg)](http://opentracing.io)
 [![Total Downloads](https://poser.pugx.org/opentracing/opentracing/downloads)](https://packagist.org/packages/opentracing/opentracing)
 [![Minimum PHP Version](https://img.shields.io/badge/php-%3E%3D%205.6-8892BF.svg)](https://php.net/)