Update FortUTF version (!86)

## What is the bug
FortUTF did not return correct error code for failed test.
## How do you fix it
[This PR(merged)](https://github.com/artemis-beta/FortUTF/pull/22

) fixed the problem.

Approved-by: Jonas Jucker <jonas.jucker@env.ethz.ch>
Merged-by: Jonas Jucker <jonas.jucker@env.ethz.ch>
Changelog: bugfix