Specify exact version for assert_cmd and predicates
Specify exact version for assert_cmd and predicates

Since their official MSRV is at 1.54, while ours is 1.48, any patch
update might break our MSRV! To prevent this specify a
specific version.

Signed-off-by: Jonathan Schwender <3101d80b51e76f6dbe7fac0f26a10baef1c09a88@gmail.com>

mozilla/sccache,mozilla/sccache,mozilla/sccache