twig: Added overload to Template.render when allow_async=false (#42593)

* Added overload to twig Template.render when allow_async=false

* twig: added test to demonstrate behavior with allow_async

* twig: added test with unknown boolean

* twig: fixed whitespace

types/twig/index.d.ts

@@ -3,6 +3,7 @@
 // Definitions by: Carlos Ballesteros Velasco <https://github.com/soywiz>
 //                 Tim Schumacher <https://github.com/enko>
 //                 Maik Tizziani <https://github.com/mtizziani>
+//                 Daniel Melcer <https://github.com/dmelcer9>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 // Imported from: https://github.com/soywiz/typescript-node-definitions/twig.d.ts
@@ -24,6 +25,7 @@ export interface Parameters {
 
 export interface Template {
     reset(blocks: any): void;
+    render(context?: any, params?: any, allow_async?: false): string;
     render(context?: any, params?: any, allow_async?: boolean): string | Promise<string>;
     renderAsync(context?: any, params?: any): Promise<string>;
     importFile(file: string): Template;

types/twig/twig-tests.ts

@@ -20,6 +20,17 @@ const params: twig.Parameters = {
 
 const temp: twig.Template = twig.twig(params);
 
+const result: string = temp.render();
+
+const async_result: string | Promise<string> = temp.render(undefined, undefined, true);
+
+function twig_async_param(b: boolean) {
+    const maybe_async_result: string | Promise<string> = temp.render(undefined, undefined, b);
+}
+
+twig_async_param(true);
+twig_async_param(false);
+
 const compOpts: twig.CompileOptions = {
 	filename: str,
 	settings: value