Add launch setting to update to prereleases

Increase version to 3.9.2

index.html

@@ -25,7 +25,7 @@
 	<script>
 		if (typeof module === 'object') {window.module = module; module = undefined;}//jQuery Fix
 		const isApp = typeof require !== 'undefined';
-		const appVersion = '3.9.1';
+		const appVersion = '3.9.2';
 
 		window.onerror = (message, file, line) => {
 			if (window.Blockbench && window.Blockbench.setup_successful) return;

main.js

@@ -197,6 +197,9 @@ app.on('ready', () => {
 	
 			autoUpdater.autoInstallOnAppQuit = true;
 			autoUpdater.autoDownload = false;
+			if (LaunchSettings.get('update_to_prereleases') === true) {
+				autoUpdater.allowPrerelease = true;
+			}
 	
 			autoUpdater.on('update-available', (a) => {
 				console.log('update-available', a)

package.json

@@ -1,7 +1,7 @@
 {
 	"name": "Blockbench",
 	"description": "Model editing and animation software",
-	"version": "3.9.1",
+	"version": "3.9.2",
 	"license": "GPL-3.0-or-later",
 	"author": {
 		"name": "JannisX11",