Update MSRV check to account for features #536

Job	Run time
formatting	8s
mavlink-dump	49s
linting	1m 39s
internal-tests (ardupilotmega)	1m 4s
msrv	59s
internal-tests (asluav)	1m 19s
msrv (--features serde)	59s
internal-tests (matrixpilot)	2m 10s
msrv (--features tokio-1)	1m 1s
internal-tests (minimal)	1m 20s
internal-tests (paparazzi)	1m 15s
internal-tests (python_array_test)	1m 30s
internal-tests (slugs)	1m 11s
internal-tests (standard)	1m 1s
internal-tests (test)	1m 11s
internal-tests (ualberta)	1m 20s
internal-tests (uavionix)	1m 10s
internal-tests (icarous)	1m 10s
internal-tests (common)	1m 6s
docs	29s
build (macos-latest, x86_64-apple-darwin, --features ardupilotmega)	1m 26s
build (ubuntu-latest, arm-unknown-linux-musleabihf, --features ardupilotmega)	2m 8s
build (ubuntu-latest, armv7-unknown-linux-musleabihf, --features ardupilotmega)	2m 2s
build (ubuntu-latest, x86_64-unknown-linux-musl, --features ardupilotmega)	2m 1s
build (ubuntu-latest, x86_64-unknown-linux-musl, --features ardupilotmega,emit-description,emit-e...	1m 58s
build (ubuntu-latest, thumbv7m-none-eabi, --no-default-features --features embedded)	1m 5s
build (windows-latest, x86_64-pc-windows-msvc, --features ardupilotmega)	3m 9s
test-embedded-size	39s
	37m 19s

Provide feedback