Bump acorn from 7.1.0 to 7.1.1
Bump acorn from 7.1.0 to 7.1.1

Bumps [acorn](https://github.com/acornjs/acorn) from 7.1.0 to 7.1.1.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](https://github.com/acornjs/acorn/compare/7.1.0...7.1.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
watson-developer-cloud/personality-insights-nodejs,watson-developer-cloud/personality-insights-nodejs