Add rules and test for draft 3 to 4 schema keyword

[suprith-hub]

No description provided.

[suprith-hub]

@jviotti I have changed it to properties instead of $defs...

[jviotti]

Looks good but there is a git conflict. Can you resolve?

[suprith-hub]

@jviotti I am not allowed to resolve conflicts for this PR.. can you help...

[jviotti]

@Era-cell What do you mean by "not allowed"? You have permissions to push on this repo (like you have been doing all along)! The typical workflow I do, in case it helps, is:

# First make sure the target of your PR, `main`, is up-to-date
$ git checkout main
$ git pull

# Go to the conflicted branch and initiate a rebase
$ git checkout draft3To4schema
$ git rebase main

# At this point, git should complain about conflicts and tell you which files are in conflict.
# You can open the conflicted files in your editor and manually fix the conflict
$ code test/from-draft7/to-2019-09/schema.json

# Once it looks good, proceed with the rebase
$ git add .
$ git rebase --continue

# Done! Just force re-push to push your resolution
$ git push -f

[suprith-hub]

@jviotti thank you, now I am able to rebase, previously I resolve conflicts button and squash and merge buttons were disabled.
Right now its good 👍