Remove .js suffix in require paths

Remove the .js suffix in require paths to make requires consistent
across the project.

sharedPlugins/serverManager/index.js

@@ -8,7 +8,7 @@ module.exports = class remoteCommands {
 		this.messageInterface = messageInterface;
 		this.config = mergedConfig;
 		this.socket = extras.socket;
-		const pluginManager = require("lib/manager/pluginManager.js");
+		const pluginManager = require("lib/manager/pluginManager");
 		// const modManager = require("lib/manager/modManager");
 		this.socket.on("hello", () => {
 			this.socket.emit("registerServerManager");

sharedPlugins/serverManager/masterPlugin.js

@@ -22,10 +22,10 @@ class masterPlugin {
 		// this.banlist = getDatabaseSync("database/banlist.json").banlist || [];
 		
 		// initialize web API
-		require("./js/api-endpoints.js")(this);
+		require("./js/api-endpoints")(this);
 		
 		// expose UI elements embedded in the master
-		this.ui = require("./js/ui.js").injectThis(this).ui;
+		this.ui = require("./js/ui").injectThis(this).ui;
 		
 		this.serverSockets = {};