Update dummy-json requirement from ^1.0.1 to ^2.0.0
Update dummy-json requirement from ^1.0.1 to ^2.0.0

Updates the requirements on [dummy-json](https://github.com/webroo/dummy-json) to permit the latest version.
- [Release notes](https://github.com/webroo/dummy-json/releases)
- [Commits](https://github.com/webroo/dummy-json/commits/2.0.0)

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