- Upgrade pytest-workflow to version 1.4.0, which adds support for
   contains_regex.
 - Update test cases to match the values produced by the new version of gsnap.
   Use contains_regex to reduce the sensitivity of the test cases to small
   changes in values.
 - Change the MV4-11 FLT3 hotspot mutation test to a different variant. The
   previous variant was in a hard to map region, so it is unclear if it is an
   error when it could not be found.