Port increase limit of Json payloads to master server

The default limit of 100kb to JSON payloads of bodyParser can be
exceeded when running modded games with researchSync.  Increase the
limit to 10mb as a bandaid to fix this issue.

This is a port of 25eb5e5.

CHANGELOG.md

@@ -69,6 +69,8 @@ Version 1.2.3
 - Disabled uploading mods to the master server by default as this is mostly
   just a waste of bandwidth with the mod portal being integrated into the
   game now.
+- Fixed researchSync breaking with heavily modded games due to the tech tree
+  exceeding the default 100kb limit on JSON payloads.
 
 
 Version 1.2.2

master.js

@@ -47,7 +47,9 @@ const fileUpload = require('express-fileupload');
 var app = express();
 
 app.use(cookieParser());
-app.use(bodyParser.json());
+app.use(bodyParser.json({
+	limit: '10mb',
+}));
 app.use(bodyParser.urlencoded({
 	parameterLimit: 100000,
 	limit: '10mb',