Explicit extension dependency

kylekatarnls · web-flow · commit b74e3b7d947c · 2017-09-07T18:06:40.000+02:00
diff --git a/composer.json b/composer.json
@@ -10,7 +10,8 @@
     }
   ],
   "require": {
-    "php": ">=5.3.0"
+    "php": ">=5.3.0",
+    "ext-mbstring": "*"
   },
   "require-dev": {
     "phpunit/phpunit": ">=4.8 <6.0",
