siril build fails after meson update to 1.8.0. Workaround, downgrade meson

Software Siril
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Siril version: 1.4.0.Beta2

In case others hit this issue after updating meson

After updating to meson 1.8.0 building siril fails. Downgrading meson to 1.7.2 allows siril to build correctly.

A meson bug is filed #14530

$ meson setup --prefix /usr/local --buildtype release _build
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AssertionError: for mypy

meson.build:307:24: ERROR: Unhandled python exception

This is a Meson bug and should be reported!
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This has been fixed with 1.8.1: 1.8.0 breaks Siril build · Issue #14530 · mesonbuild/meson · GitHub

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Just to be clear, 1.8.1 is not released yet. But when it is, the fix for our problem will be included

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