[CI] test with 6.10 and 7.10, mongoDB 3.2 and 3.4 (#3787)

* Node modernization on CI

* Makes sure tests dont yeild unhandled promise rejections

* Adds small delay to startDB

* Adds mongodb service

* testing default

* stupid

* testing with silent nugget

* proper versions

* Single release step

.travis.yml

@@ -1,9 +1,10 @@
 language: node_js
 dist: trusty
 node_js:
-- '4.6'
-- '6.1'
+- '6.10'
+- '7.10'
 services:
+  - mongodb
   - postgresql
   - redis-server
   - docker
@@ -27,8 +28,8 @@ env:
   global:
   - COVERAGE_OPTION='./node_modules/.bin/nyc'
   matrix:
-  - MONGODB_VERSION=3.0.8
-  - MONGODB_VERSION=3.2.6
+  - MONGODB_VERSION=3.2.13
+  - MONGODB_VERSION=3.4.4
   - PARSE_SERVER_TEST_DB=postgres
   - PARSE_SERVER_TEST_CACHE=redis
 before_script:
@@ -36,6 +37,7 @@ before_script:
 - psql -c 'create database parse_server_postgres_adapter_test_database;' -U postgres
 - psql -c 'CREATE EXTENSION postgis;' -U postgres -d parse_server_postgres_adapter_test_database
 - psql -c 'CREATE EXTENSION postgis_topology;' -U postgres -d parse_server_postgres_adapter_test_database
+- silent=1 mongodb-runner --start
 after_script:
 - bash <(curl -s https://codecov.io/bash)
 
@@ -43,8 +45,8 @@ jobs:
   include:
     # release on github latest branch
     - stage: release
-      node_js: '6.1'
-      env: RELEASE=github-latest
+      node_js: '6.10'
+      env: 
       before_script: skip
       after_script: skip
       script: skip
@@ -54,14 +56,6 @@ jobs:
           script: ./resources/npm-git.sh
           on:
            branch: master
-    # release on npm
-    - stage: release
-      before_script: skip
-      after_script: skip
-      script: skip
-      node_js: '6.1'
-      env: RELEASE=npm
-      deploy:
         - provider: npm
           skip_cleanup: true
           email: