Updated to remove the deprecated .count (#250)

* Updated to remove the deprecated .count

Replaced with the faster version `estimatedDocumentCount`

* Updated to latest mongoose

* Adding peerDependency

Author: Mattchewone

lib/service.js

@@ -98,7 +98,7 @@ class Service {
     }
 
     if (count) {
-      return model.where(query).count().exec().then(executeQuery);
+      return model.where(query).estimatedDocumentCount().exec().then(executeQuery);
     }
 
     return executeQuery();

package.json

@@ -56,6 +56,9 @@
   "directories": {
     "lib": "lib"
   },
+  "peerDependencies": {
+    "mongoose": "^5.2.5"
+  },
   "dependencies": {
     "@feathersjs/commons": "^1.3.0",
     "@feathersjs/errors": "^3.2.0",
@@ -71,7 +74,7 @@
     "feathers-service-tests": "^0.10.0",
     "istanbul": "^1.1.0-alpha.1",
     "mocha": "^5.0.0",
-    "mongoose": "^5.0.0",
+    "mongoose": "^5.2.5",
     "semistandard": "^12.0.0",
     "sinon-chai": "^3.0.0",
     "sinon": "^6.0.0"