v3.0.97
- Upgrade core testlogger to 3.0.31
- Fix: test results file must overwrite existing file. See
/~https://github.com/spekt/nunit.testlogger/issues/76
/~https://github.com/spekt/nunit.testlogger/blob/master/CHANGELOG.md#v3097---20210310
/~https://github.com/spekt/nunit.testlogger/blob/master/CHANGELOG.md#v3097---20210310