Refactor: README.md & readme.txt

[Pathan-Amaankhan]

Description

We are getting an error notice from WordPress regarding too many tags & non-existing WordPress.org profiles added to our readme which needs to be fixed.

Actionable items

• Investigate the broken/non-existing WordPress.org profiles from README.md/readme.txt & update/remove them.
• Remove non-required tags from README.md/readme.txt. (At max 5 tags are allowed & the rest of them should be removed.)
• Make sure that README.md/readme.txt of develop & master branch are in sync.

Additional Notes

• While working on tags please first list all the available tags (from README.md/readme.txt) & tag @nitun to get the list of tags to be kept.

cc: @dhawalepranav @joelabreo227

[Pathan-Amaankhan]

This issue is fixed in v2.3.1.