cn-cbor: remove invalid check_min_cppstd

[valgur]

Required by the latest version of cose-c.

[AbrilRBS]

Maybe we can get upstream to generate a release we can pin?
In their READMe they have Conan instructions to use ranges and it would be a pitty if someone followed that and got an old commit

[stale]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[valgur]

Maybe we can get upstream to generate a release we can pin? In their READMe they have Conan instructions to use ranges and it would be a pitty if someone followed that and got an old commit

@RubenRBS That would be ideal, indeed, but I don't really feel like taking that on currently, tbh. Can we merge this one as is, maybe?

[franramirez688]

The project has had no activity for 4 years, so I think it's not worth adding the last commit as a new version. If they release a new version, let's add it for sure.

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 2 (198838ebeb7143ee7ab098d6640412b69f395566):

• cn-cbor/1.0.0:
  All packages built successfully! (All logs)

---

Conan v2 pipeline ✔️

Note: Conan v2 builds are now mandatory. Please read our discussion about it.

All green in build 2 (198838ebeb7143ee7ab098d6640412b69f395566):

• cn-cbor/1.0.0:
  All packages built successfully! (All logs)