refactor: Use __dir__ method available on Ruby 2.0+
refactor: Use __dir__ method available on Ruby 2.0+

This patch is intended to simplify code a little bit.

Signed-off-by: Dmitry Fleytman <a8cf97adadec4e1b734a39bc5aea71b5741cfca1@daynix.com>

rbld/gitv