Update bem-pr to 0.10.0

See narqo/bem-pr#87 for details
select: Upside-down arrow becomes cloudy in Fx
Update gemini-screens
Merge pull request #1012 from bem/issues/1010@v2

select: Upside-down arrow becomes cloudy in Fx
input_type_textarea: Delete elem clear
Update gemini-screens
Changes after review