wided cached composer directories

include cache-repo-dir in cache so dependency resolution is faster when running `composer update`
see: https://getcomposer.org/doc/06-config.md#cache-repo-dir

Author: bendavies

.circleci/config.yml

@@ -59,12 +59,12 @@ commands:
       - save_cache:
           name: Save Composer cache
           paths:
-            - ~/.composer/cache/files
+            - ~/.composer/cache
           key: composer-cache-{{ .Branch }}-{{ .BuildNum }}
       - save_cache:
           name: Save Composer cache
           paths:
-            - ~/.composer/cache/files
+            - ~/.composer/cache
           key: composer-cache-{{ .Revision }}-{{ .BuildNum }}
   save-php-cs-fixer-cache:
     steps:

.travis.yml

@@ -6,7 +6,7 @@ env:
 
 cache:
   directories:
-    - $HOME/.composer/cache/files
+    - $HOME/.composer/cache
     - $HOME/.npm
 
 .steps: