feat(added lessThan rule): added lessThan and greaterThan rule

[hiteshmungpara]

Proposed changes

added lessThan and greaterThan rule

Types of changes

What types of changes does your code introduce?

• [ ] Bugfix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• [x] I have read the CONTRIBUTING doc
• [x] Lint and unit tests pass locally with my changes
• [x] I have added tests that prove my fix is effective or that my feature works.
• [x] I have added necessary documentation (if appropriate)

[thetutlage]

How about adding the counterpart greaterThan as well?

[hiteshmungpara]

How about adding the counterpart greaterThan as well?

I have added greaterThan rule.

[thetutlage]

Seems like the tests are failing https://github.com/adonisjs/validator/runs/4630947409?check_suite_focus=true#step:5:924

[hiteshmungpara]

Seems like the tests are failing https://github.com/adonisjs/validator/runs/4630947409?check_suite_focus=true#step:5:924

fixed