Adds mbstring extension as package dependency

Potherca · web-flow · commit dafbdc8f71d3 · 2016-09-20T07:01:45.000+02:00
Fixes #6.
diff --git a/composer.json b/composer.json
@@ -19,7 +19,8 @@
         "issues": "https://github.com/phalcongelist/php-diff/issues"
     },
     "require": {
-        "php": ">= 5.4"
+        "php": ">= 5.4",
+        "ext-mbstring": "*"
     },
     "require-dev": {
         "squizlabs/php_codesniffer": "~2.6"
