Use latest release of Mongoose & add comment to explain post remove comment issue

packages/strapi-mongoose/lib/index.js

@@ -144,6 +144,8 @@ module.exports = function (strapi) {
                     save: 'afterSave'
                   };
 
+                  // Mongoose doesn't allow post 'remove' event on model.
+                  // See https://github.com/Automattic/mongoose/issues/3054
                   _.forEach(postLifecycle, (fn, key) => {
                     if (_.isFunction(target[model.toLowerCase()][fn])) {
                       collection.schema.post(key, function (doc, next) {

packages/strapi-mongoose/package.json

@@ -16,7 +16,7 @@
   "main": "./lib",
   "dependencies": {
     "lodash": "^4.17.4",
-    "mongoose": "^5.0.4",
+    "mongoose": "^5.0.15",
     "mongoose-float": "^1.0.2",
     "pluralize": "^6.0.0",
     "strapi-utils": "3.0.0-alpha.12"
@@ -48,4 +48,4 @@
     "npm": ">= 5.3.0"
   },
   "license": "MIT"
-}
+}