Add deprecation notice to README

[msz]

Makes the expectations clear.

[sgerrand]

[coladarci]

Just noticed this when trying to do some deps upgrades - is there a different project that the community is moving towards out of curiosity? Thanks for all the work on this - it was fun while it lasted! :)

[sgerrand]

👋 @msz: When are you planning to merge this change?

[sgerrand]

Just noticed this when trying to do some deps upgrades - is there a different project that the community is moving towards out of curiosity? Thanks for all the work on this - it was fun while it lasted! :)

The diff in this change may be of interest:

Using an actively developed alternative like Flop is recommended.

[coladarci]

The diff in this change may be of interest:

who reads articles when you can just share the headline. 😆 thanks - I'm in the middle of trying out FLOP, definitely a complex migration but a very interesting project! thanks..