meson: update to latest version

The latest version of poky has upgraded to 0.54.2, so do it here
as well.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: If0b109cabed4a27c2f2d1971f985377f45b79816
diff --git a/build-unit-test-docker.sh b/build-unit-test-docker.sh
index dbf4e78..b786d27 100755
--- a/build-unit-test-docker.sh
+++ b/build-unit-test-docker.sh
@@ -271,7 +271,7 @@
 RUN pip3 install inflection
 RUN pip3 install pycodestyle
 RUN pip3 install jsonschema
-RUN pip3 install meson==0.53.2
+RUN pip3 install meson==0.54.2
 
 FROM openbmc-base as openbmc-lcov
 RUN curl -L https://github.com/linux-test-project/lcov/archive/${PKG_REV['lcov']}.tar.gz | tar -xz && \