Merge pull request #122 from alchemy-fr/feature/mbstring-polyfill

Require mbstring polyfill instead of extension

Author: aztech-dev

composer.json

@@ -13,10 +13,10 @@
     ],
     "require": {
         "php": ">=5.5",
-        "ext-mbstring": "*",
         "doctrine/collections": "~1.0",
         "symfony/filesystem": "^2.0.5|^3.0",
-        "symfony/process": "^2.1|^3.0"
+        "symfony/process": "^2.1|^3.0",
+        "symfony/polyfill-mbstring": "^1.3"
     },
     "require-dev": {
         "ext-zip": "*",