fix: meson: raise minimum version for meson to 0.55.0
Some parts of the build system require 0.55.0 features, but the minimum version was set to ">= 0.53" so far. This generated warnings like the following (only one example given):
../src/util/meson.build:316: WARNING: Project targeting '>= 0.53' but tried to use feature introduced in '0.55.0': "test" keyword argument "protocol" value "gtest".
Since Meson 0.55.0 was released almost two years ago (see https://github.com/mesonbuild/meson/releases/tag/0.55.0) it seems easier to raise the minimum globally than trying to set the minimum dynamically.
- Fixes: e73096bd (meson: use gtest protocol for gtest based tests when possible)
- Signed-off-by: Kai Wasserbäch kai@dev.carbon-project.org