message: Fix copy of output when `stagingFolderPath` isn't specified.
diff: @@ -676,10 +676,10 @@ export class Program {
  //copy the brighterscript stdlib to the output directory
  promises.push(
  - fsExtra.ensureDir(s`${this.options.stagingFolderPath}/source`).then(() => {
  + fsExtra.ensureDir(s`${stagingFolderPath}/source`).then(() => {
  return fsExtra.copyFile(
  s`${__dirname}/../bslib.brs`,
  - s`${this.options.stagingFolderPath}/source/bslib.brs`
  + s`${stagingFolderPath}/source/bslib.brs`
  );
  })
  );
  