Summary:
This is primarily an update which disables the
`modernize-use-trailing-return-type` suggestion introduced in
clang-tidy-9. Old clang-tidy versions should ignore removed checks which
don't exist in the first place, so this should change should be
compatible with any version.
Reviewers: mferencevic, ipaljak
Reviewed By: mferencevic
Subscribers: pullbot
Differential Revision: https://phabricator.memgraph.io/D2511
