Log Message:
devel/ruby-test-unit: update to 3.3.6

Update ruby-test-unit to 3.3.6.

# News

## 3.3.6 - 2020-06-10 {#version-3-3-6}

### Improvements

  * `name`, `--ignore-name`:

     * Added support for regular expression options.

     * Added support for matching with class name in exact match mode.
       [Reported by Jun Aruga]

  * Updated ruby-talk mailing list information
    [GitHub#168][Patch by Chris Kampmeier]

### Thanks

  * Chris Kampmeier

  * Jun Aruga