Update dependencies to enable Greenkeeper 🌴 (#3940)

* chore(package): update dependencies

* docs(readme): add Greenkeeper badge

* Fix indent issues with eslint 4.0

see http://eslint.org/docs/user-guide/migrating-to-4.0.0\#-the-indent-rule-is-more-strict

package.json

@@ -22,10 +22,10 @@
     "body-parser": "1.17.2",
     "commander": "2.9.0",
     "deepcopy": "0.6.3",
-    "express": "4.15.2",
+    "express": "4.15.3",
     "intersect": "1.0.1",
     "lodash": "4.17.4",
-    "lru-cache": "4.1.0",
+    "lru-cache": "4.1.1",
     "mime": "1.3.6",
     "mongodb": "2.2.28",
     "multer": "1.3.0",
@@ -34,7 +34,7 @@
     "parse-server-push-adapter": "1.3.0",
     "parse-server-s3-adapter": "1.0.6",
     "parse-server-simple-mailgun-adapter": "1.0.0",
-    "pg-promise": "5.9.1",
+    "pg-promise": "5.9.3",
     "redis": "2.7.1",
     "request": "2.81.0",
     "semver": "5.3.0",
@@ -55,7 +55,7 @@
     "bcrypt-nodejs": "0.0.3",
     "cross-env": "5.0.1",
     "deep-diff": "0.3.8",
-    "eslint": "^3.16.1",
+    "eslint": "^4.0.0",
     "eslint-plugin-flowtype": "^2.25.0",
     "gaze": "1.1.2",
     "jasmine": "2.6.0",