Merge from vscode 011858832762aaff245b2336fb1c38166e7a10fb (#4663)

src/vs/workbench/services/extensions/node/extensionHostProcess.ts

@@ -23,7 +23,7 @@ import { exit, ExtensionHostMain } from 'vs/workbench/services/extensions/node/e
 	const Module = require.__$__nodeRequire('module') as any;
 	const originalLoad = Module._load;
 
-	Module._load = function (request) {
+	Module._load = function (request: string) {
 		if (request === 'natives') {
 			throw new Error('Either the extension or a NPM dependency is using the "natives" node module which is unsupported as it can cause a crash of the extension host. Click [here](https://go.microsoft.com/fwlink/?linkid=871887) to find out more');
 		}

src/vs/workbench/services/extensions/node/lazyPromise.ts

@@ -83,7 +83,7 @@ export class LazyPromise implements Promise<any> {
 		return this._ensureActual().then(undefined, error);
 	}
 
-	public finally(callback): any {
+	public finally(callback: () => void): any {
 		return this._ensureActual().finally(callback);
 	}
 }