Removed mnsami/composer-custom-directory-installer as dependency; no longer needed for Carbon Fields >=2.0.0

Author: dmhendricks

composer.json

@@ -10,6 +10,11 @@
       "name": "Daniel M. Hendricks",
       "homepage": "https://danhendricks.com",
       "role": "Developer"
+    },
+    {
+      "name": "Hans-Helge Buerger",
+      "homepage": "https://hanshelgebuerger.de",
+      "role": "Developer"
     }
   ],
   "support": {
@@ -35,18 +40,12 @@
       }
   ],
   "require": {
-    "php": ">=5.3.29",
-    "mnsami/composer-custom-directory-installer": "^1.1.0",
+    "php": ">=5.3",
     "htmlburger/carbon-fields": "^2.0.0",
     "jjgrainger/posttypes": "dev-master",
     "jashkenas/underscore": ">=1.8.0",
     "composer/installers": "~1.3.0"
   },
-  "extra":{
-    "installer-paths":{
-      "./vendor/htmlburger/carbon-fields": ["htmlburger/carbon-fields"]
-    }
-  },
   "minimum-stability": "dev",
   "autoload": {
     "psr-4": {