Hera versions lower than 5 missing on PyPi

[janowskijak]

Hi,

Versions of Hera lower than 5 are missing on PyPi and can no longer be installed. Was this done on purpose?

[sambhav]

@janowskijak you can find older versions of hera at hera-workflows. See #532

[janowskijak]

Thanks @samj1912, did not realize this. Maybe a mention in readme would be helpful.

[flaviuvadan]

@janowskijak added a note in this PR

[janowskijak]

Awesome, much appreciated.