Incompatibility with Mongoose 4.x

[jayfang]

During module load (via "require") following error is seen with V4.0.2 of Mongoose

TypeError: object is not a function
at new SchemaArray ( ... /node_modules/hapi-oauth-store-multi-tenant/node_modules/mongoose-oauth-store-multi-tenant/node_modules/mongoose/lib/schema/array.js:58:19)
...
at Object. (... /node_modules/hapi-oauth-store-multi-tenant/node_modules/mongoose-oauth-store-multi-tenant/lib/schemas/oauth-app-schema.js:123:18)
...