Require Boost 1.82.0 or higher

[edolstra]

Motivation

Slight cleanup to remove legacy code.

Note: this version of Boost was released in April 2023.

Context

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[xokdvium]

@edolstra, we should probably bump the required version in all meson subprojects, not just libexpr. Also I think I brought up that we shouldn't really support boost <= 1.82 in the symbol table pr #13258 (comment).

[edolstra]

I think it's enough to test it in one subproject since it will fail the entire build if the condition in libexpr isn't met.

Do you mean boost <= 1.82 or boost < 1.82?

[Ericson2314]

The min versions can be different, but should reflect the actual need of the project in question.

That means the libutil needs to also require what it needs (i.e. avoid the broken versions, e.g. by requiring the fixed version as a minimum) but libstore etc. don't need to be changed.

[Ericson2314]

So please turn that into a src/libutil/meson.build somehow per the above, otherwise this looks good to me.

[edolstra]

Putting boost version requirements in every subprojects seems unmaintainable and unnecessary code duplication. But we could put a check in libutil since everything else depends on it.

[edolstra]

I've moved the version check to libutil.

[xokdvium]

Makes sense. This is much more maintainable!