Reduce the verbosity of skipped tests #140
Description
When there is a Unicode version mismatch, the test outputs a message for each mismatch, which can generate a lot of warnings, see #137.
It seemed useful at first to check the expected mismatches, but this is probably unnecessary verbose. We should probably remove them or deactivate them by default propose an option to enable them.
I wonder if tasty has better tooling for this.