Bump faker from 1.9.6 to 2.1.0 and update faker api (#11489)

* Bump faker from 1.9.6 to 2.1.0

Bumps [faker](https://github.com/stympy/faker) from 1.9.6 to 2.1.0.
- [Release notes](https://github.com/stympy/faker/releases)
- [Changelog](https://github.com/stympy/faker/blob/master/CHANGELOG.md)
- [Commits](https://github.com/stympy/faker/compare/1.9.6...v2.1.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

* Use faker api v2

https://github.com/stympy/faker/releases/tag/2.0

spec/fabricators/account_identity_proof_fabricator.rb

@@ -1,7 +1,7 @@
 Fabricator(:account_identity_proof) do
   account
   provider 'keybase'
-  provider_username { sequence(:provider_username) { |i| "#{Faker::Lorem.characters(15)}" } }
+  provider_username { sequence(:provider_username) { |i| "#{Faker::Lorem.characters(number: 15)}" } }
   token { sequence(:token) { |i| "#{i}#{Faker::Crypto.sha1()*2}"[0..65] } }
   verified false
   live false