Should we update required meson version?

[charris]

There is a build message that we are using features not present in meson 1.2.99

WARNING: Project specifies a minimum meson_version '>=1.2.99' but uses features which were added in newer versions:

The specification is in meson.build. I'm guessing that our vendored meson is based on an old version.

[rgommers]

This is very easy to get rid of; it's caused by my code for BLAS/LAPACK support marking that BLAS detection as a feature for Meson 1.3.0, which made sense when that was the next version. But of course that means Meson thinks that it's not included in the current version (which it is, because this is a fork with the extra feature).

tl;dr it's harmless, but we can update our fork to pull in new maintenance fixes and that'll get rid of it.