Merge pull request #669 from jfcherng/fix-composer-readme

Fix composer package name should be all lowercase

Author: Geolim4

README.md

@@ -271,7 +271,7 @@ As Fast To Implement As Opening a Beer
 
 
 ```bash
-composer require phpFastCache/phpFastCache
+composer require phpfastcache/phpfastcache
 ```
 
 #### :construction: Step 2: Setup your website code to implement the phpFastCache calls (with Composer)