Fixed broken build and remove depencency on taggable

Author: Nyholm

composer.json

@@ -27,7 +27,6 @@
         "php":                  "^5.5 || ^7.0",
         "psr/cache":            "^1.0",
         "cache/adapter-common": "^0.4",
-        "cache/taggable-cache": "^0.4",
         "mongodb/mongodb":      "^1.0"
     },
     "require-dev":       {