Bump faker from 2.19.0 to 2.21.0

Bumps [faker](https://github.com/faker-ruby/faker) from 2.19.0 to 2.21.0.
- [Release notes](https://github.com/faker-ruby/faker/releases)
- [Changelog](https://github.com/faker-ruby/faker/blob/master/CHANGELOG.md)
- [Commits](https://github.com/faker-ruby/faker/compare/v2.19.0...v2.21.0)

---
updated-dependencies:
- dependency-name: faker
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -187,8 +187,8 @@ GEM
     fake_email_validator (1.0.11)
       activemodel
       mail
-    faker (2.19.0)
-      i18n (>= 1.6, < 2)
+    faker (2.21.0)
+      i18n (>= 1.8.11, < 2)
     ffi (1.15.5)
     ffi-compiler (1.0.1)
       ffi (>= 1.0.0)