message: [now-build-utils] Change `script` to `scripts` in error message
  Change `script` to `scripts` in error message.
diff: @@ -18,7 +18,7 @@ const config: Config = { zeroConfig: true };
  const MISSING_BUILD_SCRIPT_ERROR: ErrorResponse = {
  code: 'missing_build_script',
  message:
  - 'Your `package.json` file is missing a `build` property inside the `script` property.' +
  + 'Your `package.json` file is missing a `build` property inside the `scripts` property.' +
  '\nMore details: https://zeit.co/docs/v2/platform/frequently-asked-questions#missing-build-script',
  };
  