Updated `enb-bem-docs` to `0.2.6`
select: button text is wrong in case of groups (close #885)
Merge pull request #886 from bem/issues/885@v2

select: button text is wrong in case of groups (close #885)
Merge pull request #882 from bem/issues/881@v2

Updated `enb-bem-docs` to `0.2.6`
Simplified enb config