APIDeletedrevs added

[eisheeta]

1. Modified readme.md file
2. Modified modules.json file
3. Added code for Deletedrevs API

Tests:

1. Tested the API in sandbox as well as on Postman.
2. Tested Python code on my system with Pycharm.

Observation:
Both provided the same result.

[srish]

Thanks @eisheeta for working on this! I've made some minor fixes in your code and documentation.. it would be great it you could take a look at them and understand what I've changed :)

You can move your documentation changes to main namespace on MediaWiki.org. When you update the API:Deletedrevs page, make sure to leave in a comment: "updated as per API documentation improvements project". Thanks!

[eisheeta]

Hello @srish
Thank you so much for your feedback! All the changes have been duly noted! :)
Sorry for the inconvenience with my previous pull request. I'll take care of it next time!

[srish]

@eisheeta You can move https://www.mediawiki.org/wiki/User:Eisheeta/Sandbox/API:Deletedrevs this to main namespace on MediaWiki.org. Let me know if you've any questions about it :)