Implement require option for modules

Implement option allowing files to be required from control.lua be
specified in modules.json.

lib/factorio/patch.js

@@ -82,10 +82,13 @@ function generateLoader(patchInfo) {
 
 	for (let module of patchInfo["modules"]) {
 		for (let file of module["files"]) {
+			let requirePath = `modules/${module.name}/${file["path"].slice(0, -4)}`;
 			if (file["load"]) {
-				let requirePath = `modules/${module.name}/${file["path"].slice(0, -4)}`;
 				lines.push('event_handler.add_lib(require("'+requirePath+'"))');
 			}
+			if (file["require"]) {
+				lines.push('require("'+requirePath+'")');
+			}
 		}
 	}
 
@@ -251,6 +254,7 @@ async function patch(savePath, modules) {
 					moduleInfo["files"].push({
 						"path": relativePath,
 						"load": module.load.includes(relativePath),
+						"require": module.require.includes(relativePath),
 					});
 
 				} else if (entry.isDirectory()) {