run tests against mongodb 4.0 (#5250)

* run tests against mongodb 4.0

* Adds compatibility shields

Author: flovilmart

.travis.yml

@@ -27,8 +27,8 @@ env:
   global:
   - COVERAGE_OPTION='./node_modules/.bin/nyc'
   matrix:
-  - MONGODB_VERSION=3.2.13
-  - MONGODB_VERSION=3.4.4
+  - MONGODB_VERSION=4.0.4
+  - MONGODB_VERSION=3.6.9
   - PARSE_SERVER_TEST_DB=postgres
   - PARSE_SERVER_TEST_CACHE=redis
   - NODE_VERSION=11.4.0

README.md

@@ -7,6 +7,12 @@
 [![Join Chat](https://img.shields.io/badge/gitter-join%20chat%20%E2%86%92-brightgreen.svg)](https://gitter.im/ParsePlatform/Chat)
 [![Greenkeeper badge](https://badges.greenkeeper.io/parse-community/parse-server.svg)](https://greenkeeper.io/)
 
+
+[![](https://img.shields.io/badge/mongodb-3.2-green.svg?logo=mongodb&style=flat)]()
+[![](https://img.shields.io/badge/mongodb-3.4-green.svg?logo=mongodb&style=flat)]()
+[![](https://img.shields.io/badge/mongodb-3.6-green.svg?logo=mongodb&style=flat)]()
+[![](https://img.shields.io/badge/mongodb-4.0-green.svg?logo=mongodb&style=flat)]()
+
 Parse Server is an [open source version of the Parse backend](http://blog.parseplatform.org/announcements/introducing-parse-server-and-the-database-migration-tool/) that can be deployed to any infrastructure that can run Node.js.
 
 Parse Server works with the Express web application framework. It can be added to existing web applications, or run by itself.

package.json

@@ -76,8 +76,8 @@
     "lint": "flow && eslint --cache ./",
     "build": "babel src/ -d lib/ --copy-files",
     "watch": "babel --watch src/ -d lib/ --copy-files",
-    "test": "cross-env MONGODB_VERSION=${MONGODB_VERSION:=3.2.6} MONGODB_STORAGE_ENGINE=mmapv1 TESTING=1 jasmine",
-    "coverage": "cross-env MONGODB_VERSION=${MONGODB_VERSION:=3.2.6} MONGODB_STORAGE_ENGINE=mmapv1 TESTING=1 nyc jasmine",
+    "test": "cross-env MONGODB_VERSION=${MONGODB_VERSION:=4.0.4} MONGODB_STORAGE_ENGINE=mmapv1 TESTING=1 jasmine",
+    "coverage": "cross-env MONGODB_VERSION=${MONGODB_VERSION:=4.0.4} MONGODB_STORAGE_ENGINE=mmapv1 TESTING=1 nyc jasmine",
     "start": "node ./bin/parse-server",
     "prepare": "npm run build",
     "postinstall": "node -p 'require(\"./postinstall.js\")()'"