Update dependency cargo-msrv to v0.16.0 (#56)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

cargo-plugins.sh

@@ -18,7 +18,7 @@ cargo install [email protected] --force --quiet --locked
 
 echo
 echo "🦀 Installing cargo-msrv"
-cargo install cargo-msrv@0.15.1 --force --quiet --locked
+cargo install cargo-msrv@0.16.0 --force --quiet --locked
 
 echo
 echo "🦀 Installing cargo-machete"