Consider supporting older Clojure versions

[lread]

Perceived Problem

Babashka http-client relies on relatively recent Clojure fns:

Added in 1.11:

• random-uuid

Added in 1.10

• ex-cause
• ex-message

This can make it less attractive as a dependency for libraries that would like to support less recent versions of Clojure. In my case this is Etaoin, which supports Clojure 1.9 and above.

Proposal

• Replace the above newer fns with Clojure 1.9 compatible code (changes are minor).
• Decide the minimum version of Clojure http-client wants to support (is 1.9 good?) and add test coverage (including on CI) for supported versions.

Next Steps

Happy to do this work if you are interested in this change.

[borkdude]

Roughly 5 years ago I supported 1.9 and 1.10. Now 1.11 came out and it's almost 1.12 time.

Perhaps we can move the lower range to 1.10? Supporting the last two CLJ versions seems reasonable?

[lread]

That seems reasonable to me. I can bump min version of Clojure for Etaoin to 1.10 as well.