Enhance workflow (#325)

* Use new badge in readme
* Try less extensions
* Remove mbstring

Author: samdark

.github/workflows/build.yml

@@ -29,7 +29,7 @@ jobs:
               with:
                   php-version: ${{ matrix.php }}
                   tools: pecl
-                  extensions: curl, dom, intl, mbstring, mcrypt, pdo, mongodb
+                  extensions: mongodb
                   ini-values: date.timezone='UTC'
             - name: Get composer cache directory
               id: composer-cache

README.md

@@ -14,7 +14,7 @@ Documentation is at [docs/guide/README.md](docs/guide/README.md).
 
 [![Latest Stable Version](https://poser.pugx.org/yiisoft/yii2-mongodb/v/stable.png)](https://packagist.org/packages/yiisoft/yii2-mongodb)
 [![Total Downloads](https://poser.pugx.org/yiisoft/yii2-mongodb/downloads.png)](https://packagist.org/packages/yiisoft/yii2-mongodb)
-[![Build Status](https://travis-ci.com/yiisoft/yii2-mongodb.svg?branch=master)](https://travis-ci.com/yiisoft/yii2-mongodb)
+[![Build Status](https://github.com/yiisoft/yii2-mongodb/workflows/build/badge.svg)](https://github.com/yiisoft/yii2-mongodb/actions)
 
 
 Installation