Bump transformers from 4.5.1 to 4.6.0

Bumps [transformers](https://github.com/huggingface/transformers) from 4.5.1 to 4.6.0.
- [Release notes](https://github.com/huggingface/transformers/releases)
- [Commits](huggingface/transformers@v4.5.1...v4.6.0)

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

setup.py

@@ -56,7 +56,7 @@
         'requests~=2.22',
         'datasets==1.5.0',
         'seqeval==1.2.2',
-        'transformers==4.5.1',
+        'transformers==4.6.0',
         'sentencepiece==0.1.*',
         'sentence-transformers==1.1.1',
         'mosestokenizer~=1.1',