Bump python-crfsuite from 0.9.5 to 0.9.6 (#50)

Bumps [python-crfsuite](https://github.com/scrapinghub/python-crfsuite) from 0.9.5 to 0.9.6.
- [Release notes](https://github.com/scrapinghub/python-crfsuite/releases)
- [Changelog](https://github.com/scrapinghub/python-crfsuite/blob/master/CHANGES.rst)
- [Commits](https://github.com/scrapinghub/python-crfsuite/compare/0.9.5...0.9.6

)

Signed-off-by: dependabot[bot] <support@dependabot.com>

requirements.txt

@@ -5,7 +5,7 @@ lxml==4.2.0
 matplotlib==2.2.2
 numpy==1.14.2
 Pillow>=3.4.1
-python-crfsuite==0.9.5
+python-crfsuite==0.9.6
 Pyqtree==0.24
 requests==2.21.0
 sciencebeam-alignment==0.0.2