Bump nodejs version to 6+ (#4272)

* let travis build against 3.x

* Cleanup dependencies and bump min version to current LTS

* Makes npm-git push all branches to -preview

* restores releases

* Bumps mime to 2.0.3 (requires node 6+)

* Bumps express to latest version

* Fixes linting issue after upgrade

* Use travis-branch for partial releases

src/Controllers/FilesController.js

@@ -19,10 +19,10 @@ export class FilesController extends AdaptableController {
 
     const hasExtension = extname.length > 0;
 
-    if (!hasExtension && contentType && mime.extension(contentType)) {
-      filename = filename + '.' + mime.extension(contentType);
+    if (!hasExtension && contentType && mime.getExtension(contentType)) {
+      filename = filename + '.' + mime.getExtension(contentType);
     } else if (hasExtension && !contentType) {
-      contentType = mime.lookup(filename);
+      contentType = mime.getType(filename);
     }
 
     filename = randomHexString(32) + '_' + filename;

src/Options/index.js

@@ -116,7 +116,7 @@ export interface ParseServerOptions {
   enableSingleSchemaCache: ?boolean; // = false
   /* Sets the number of characters in generated object id's, default 10 */
   objectIdSize: ?number; // = 10
-  /* The port to run the ParseServer. defaults to 1337.@parse/gcs-adapter
+  /* The port to run the ParseServer. defaults to 1337.
   :ENV: PORT */
   port: ?number; // = 1337
   /* The host to serve ParseServer on. defaults to 0.0.0.0 */

src/Routers/FilesRouter.js

@@ -37,7 +37,7 @@ export class FilesRouter {
     const config = Config.get(req.params.appId);
     const filesController = config.filesController;
     const filename = req.params.filename;
-    const contentType = mime.lookup(filename);
+    const contentType = mime.getType(filename);
     if (isFileStreamable(req, filesController)) {
       filesController.getFileStream(config, filename).then((stream) => {
         handleFileStream(stream, req, res, contentType);