fix: default named import bug

There are issues when we import TS compiled JS files into JS because TS compiles default exports to `default` named import/export which makes it not possible to import inside JS directly.
Some of the ways to fix this is using .default in all calls or avoid using default export/import totally.

Ref: https://basarat.gitbooks.io/typescript/docs/tips/defaultIsBad.html

bin/prompt-command.js

@@ -85,9 +85,9 @@ module.exports = function promptForInstallation(packages, ...args) {
 								packages
 							);
 							if (packages === "serve") {
-								return require(pathForCmd).serve();
+								return require(pathForCmd).default.serve();
 							}
-							return require(pathForCmd)(...args); //eslint-disable-line
+							return require(pathForCmd).default(...args); //eslint-disable-line
 						})
 						.catch(error => {
 							console.error(error);
@@ -105,6 +105,6 @@ module.exports = function promptForInstallation(packages, ...args) {
 			}
 		});
 	} else {
-		require(pathForCmd)(...args); // eslint-disable-line
+		require(pathForCmd).default(...args); // eslint-disable-line
 	}
 };

packages/utils/modify-config-helper.ts

@@ -3,7 +3,7 @@ import * as fs from "fs";
 import * as logSymbols from "log-symbols";
 import * as path from "path";
 import * as yeoman from "yeoman-environment";
-import Generator from "yeoman-generator";
+import Generator = require("yeoman-generator");
 
 import runTransform from "./scaffold";
 import { IGenerator, IYeoman } from "./types/Yeoman";