Fix the '--csv is deprecated' warning.

Fixes the (linter?) warning about how `--csv` is deprecated and
`--reporter csv` should be used instead.
Merge pull request #152 from Mitranim/master

Fix the '--csv is deprecated' warning
Added subclass snippet
Merge pull request #155 from mattschofield/master

Added subclass snippet
Merge remote-tracking branch 'upstream/master'