MB-48347 Update CMAKE_MINIMUM_REQUIRED to 3.13
MB-48347 Update CMAKE_MINIMUM_REQUIRED to 3.13

Change-Id: I7449bc870f35cec0d9022222931bcac99c0a2b6a
Reviewed-on: http://review.couchbase.org/c/couchbase-cli/+/160930
Reviewed-by: James Lee <d8c596dede5f1eea3b1030b95e7922790d6e257e@couchbase.com>
Tested-by: James Lee <d8c596dede5f1eea3b1030b95e7922790d6e257e@couchbase.com>

couchbase/couchbase-cli,couchbase/couchbase-cli