chore(deps): bump acorn from 5.7.3 to 5.7.4 (#399)
chore(deps): bump acorn from 5.7.3 to 5.7.4 (#399)

Bumps [acorn](https://github.com/acornjs/acorn) from 5.7.3 to 5.7.4.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](https://github.com/acornjs/acorn/compare/5.7.3...5.7.4)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
Co-authored-by: Piotr Oleś <a96aeeb4070478fd8e5570709380b19b82288cdf@gmail.com>
Realytics/fork-ts-checker-webpack-plugin,Realytics/fork-ts-checker-webpack-plugin