Bumps [lodash](https://github.com/lodash/lodash) from 2.4.2 to 4.17.15.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/2.4.2...4.17.15)
Signed-off-by: dependabot[bot] <support@github.com>