fix: remove dir on error

Author: vltansky

index.js

@@ -19,6 +19,7 @@ const packageName = 'html5-boilerplate';
         const { from: nameWithVersion } = await extract(packageName+'@'+version, tempDir, {});
 	    spinner.text = `${nameWithVersion} copied to ${targetDir}. Have fun!`;
     }catch(err){
+        await fs.remove(tempDir);
         if(err.code === 'ETARGET' && err.type === 'tag'){
             spinner.fail(chalk.red(`version '${err.wanted}' not found in npm registry\navaialable versions:`));
             console.log(err.versions.reverse().join(' | '));