Not run Build with ci words when commented on PR.

[kama-meshi]

But run Build when NO ci words are commented.

How to reproduce

1. Crete pull request (then CI run Build)
2. Comment on PR with 'run ci words' (like ok to test, but NOT run)
3. Comment on PR with 'skip ci words' (like [skip test], but RUN)
4. Comment on PR with not ci words (like +1, but RUN)

I guess CI run Build at PR comments, when only includes 'run ci words'.

Versions

• GitBucket CI plugin version: 1.4.0
• GitBucket version: 4.23.0

Thank you.