chore(package): update dependencies

Author: nodkz

package.json

@@ -41,25 +41,25 @@
     "babel-plugin-transform-flow-strip-types": "^6.22.0",
     "babel-plugin-transform-object-rest-spread": "^6.13.0",
     "babel-plugin-transform-runtime": "^6.23.0",
-    "babel-preset-env": "^1.5.2",
+    "babel-preset-env": "^1.6.1",
     "cz-conventional-changelog": "^2.0.0",
-    "eslint": "^4.8.0",
-    "eslint-config-airbnb-base": "^12.0.1",
+    "eslint": "^4.9.0",
+    "eslint-config-airbnb-base": "^12.1.0",
     "eslint-config-prettier": "^2.6.0",
-    "eslint-plugin-flowtype": "^2.37.0",
-    "eslint-plugin-import": "^2.3.0",
+    "eslint-plugin-flowtype": "^2.39.1",
+    "eslint-plugin-import": "^2.8.0",
     "eslint-plugin-prettier": "^2.3.1",
-    "flow-bin": "^0.54.1",
-    "graphql": "^0.11.3",
-    "graphql-compose": "^2.9.0",
+    "flow-bin": "^0.57.3",
+    "graphql": "^0.11.7",
+    "graphql-compose": "^2.9.2",
     "graphql-compose-connection": ">=2.5.0",
     "graphql-compose-pagination": ">=1.1.0",
     "jest": "^21.2.1",
-    "mongodb-memory-server": "^1.5.0",
-    "mongoose": "^4.11.10",
-    "prettier": "^1.6.1",
+    "mongodb-memory-server": "^1.6.1",
+    "mongoose": "^4.12.3",
+    "prettier": "^1.7.4",
     "rimraf": "^2.6.2",
-    "semantic-release": "^7.0.2"
+    "semantic-release": "^8.2.1"
   },
   "config": {
     "commitizen": {

src/__mocks__/postModel.js

@@ -5,7 +5,6 @@ import { mongoose, Schema } from './mongooseCommon';
 const PostSchema = new Schema({
   _id: {
     type: Number,
-    unique: true,
   },
   title: {
     type: String,