Added support for Github actions (mghoneimy#66)

- Added php.yml file
- Removed .travis.yml file
- Updated badges in README.md

Author: mghoneimy

.github/workflows/php.yml

@@ -0,0 +1,39 @@
+name: PHP Composer
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php: [7.3, 7.4, 8.0]
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Validate composer.json and composer.lock
+      run: composer validate --strict
+
+    - 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
+
+    # Add a test script to composer.json, for instance: "test": "vendor/bin/phpunit"
+    # Docs: https://getcomposer.org/doc/articles/scripts.md
+
+    - name: Run test suite
+      run: composer run test

.travis.yml

@@ -1,10 +1,5 @@
 # PHP GraphQL Client
-[![Build
-Status](https://travis-ci.org/mghoneimy/php-graphql-client.svg?branch=master)](https://travis-ci.org/mghoneimy/php-graphql-client)
-[![Codacy
-Badge](https://api.codacy.com/project/badge/Grade/cb5e0708c4244c1a848be668dbcda8b0)](https://app.codacy.com/app/mghoneimy/php-graphql-client?utm_source=github.com&utm_medium=referral&utm_content=mghoneimy/php-graphql-client&utm_campaign=Badge_Grade_Dashboard)
-[![Codacy
-Badge](https://api.codacy.com/project/badge/Coverage/c2b0ae3a556547c38e1247d63228adde)](https://www.codacy.com/app/mghoneimy/php-graphql-client?utm_source=github.com&utm_medium=referral&utm_content=mghoneimy/php-graphql-client&utm_campaign=Badge_Coverage)
+![Build Status](https://github.com/mghoneimy/php-graphql-client/actions/workflows/php.yml/badge.svg)
 [![Total
 Downloads](https://poser.pugx.org/gmostafa/php-graphql-client/downloads)](https://packagist.org/packages/gmostafa/php-graphql-client)
 [![Latest Stable