Update readme.

README.md

@@ -6,25 +6,25 @@
 
 You can install the package using composer
 
-```
+```sh
 $ composer require overtrue/follow -vvv
 ```
 
 Then add the service provider to `config/app.php`
 
-```
+```php
 Overtrue\LaravelFollow\FollowServiceProvider::class
 ```
 
 Publish the migrations file:
 
-```
+```sh
 $ php artisan vendor:publish --provider="Overtrue\LaravelFollow\FollowServiceProvider" --tag="migrations"
 ```
 
 Finally, use FollowTrait in User model
 
-```
+```php
 use Overtrue\LaravelFollow\FollowTrait;
 
 class User extends Model
@@ -36,24 +36,28 @@ class User extends Model
 ## Usage
 
 ### Follow User
-```
+
+```php
 $user->follow(1)
 $user->follow([1,2,3,4])
 ```
 
 ### Unfollow User
-```
+
+```php
 $user->unfollow(1)
 $user->unfollow([1,2,3,4])
 ```
 
 ### Get Followers
-```
+
+```php
 $user->followers()
 ```
 
 ### Get Followings
-```
+
+```php
 $user->followings()
 ```
 
@@ -63,13 +67,11 @@ $user->isFollowing(1)
 ```
 
 ### Check if Followed By
-```
+
+```php
 $user->isFollowedBy(1)
 ```
 
-## Testing
-You can run test by just performing `phpunit` command
-
 ## License
 
 MIT