Ignore Windows related code for coverage

Author: sun-zheng-an

index.ts

@@ -34,6 +34,7 @@ const normalizeCommands = (commands: string | string[]): string[] => {
 
 const normalizeOptions = (options: Options = {}): Required<Options> => {
   const pathToBin = path.join(process.cwd(), 'node_modules', '.bin')
+  /* istanbul ignore next */
   const pathName = process.platform === 'win32' ? 'Path' : 'PATH'
   const newPath = pathToBin + path.delimiter + process.env[pathName]
   const env = {