Update to latest faker

[PeterMK85]

Currently an outdated faker library supported:
https://github.com/google/intermock/blob/master/package.json#L15
(4 main version)

Faker.js at the moment v5.5.3 so I thing due to a lot of changes it would be beneficial if the library supports that.

Thanks 🙇

[1muen]

https://fakerjs.dev/about/announcements/2022-01-14.html#i-heard-something-happened-what-s-the-tldr

Now latest is "@faker-js/faker": "7.6.0" since the original faker is banned from github and frozen in npm