fix: use tsc.cmd on windows for typescript (#3)

Author: gaodeng

src/targets/typescript.ts

@@ -3,16 +3,22 @@ import path from 'path';
 import child_process from 'child_process';
 import fs from 'fs-extra';
 import del from 'del';
+import { platform } from 'os';
 import { Input } from '../types';
 
 export default async function build({ root, output, report }: Input) {
-  report.info(`Cleaning up previous build at ${chalk.blue(path.relative(root, output))}`);
+  report.info(
+    `Cleaning up previous build at ${chalk.blue(path.relative(root, output))}`
+  );
 
   await del([output]);
 
   report.info(`Generating type definitions with ${chalk.blue('tsc')}`);
 
-  const tsc = path.join(root, 'node_modules', '.bin', 'tsc');
+  const tsc =
+    path.join(root, 'node_modules', '.bin', 'tsc') +
+    (platform() === 'win32' ? '.cmd' : '');
+  
   const tsconfig = path.join(root, 'tsconfig.json');
 
   try {