Update is-plain-object requirement from ^2.0.1 to ^3.0.0
Update is-plain-object requirement from ^2.0.1 to ^3.0.0

Updates the requirements on [is-plain-object](https://github.com/jonschlinkert/is-plain-object) to permit the latest version.
- [Release notes](https://github.com/jonschlinkert/is-plain-object/releases)
- [Commits](https://github.com/jonschlinkert/is-plain-object/compare/2.0.1...v3.0.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
tommy351/warehouse,tommy351/warehouse