Add selector-bem-pattern to plugins doc
Add selector-bem-pattern to plugins doc

gucong3000/stylelint,hudochenkov/stylelint,stylelint/stylelint,heatwaveo8/stylelint,hudochenkov/stylelint,hudochenkov/stylelint,gaidarenko/stylelint,stylelint/stylelint,evilebottnawi/stylelint,heatwaveo8/stylelint,stylelint/stylelint,gaidarenko/stylelint,gucong3000/stylelint,m-allanson/stylelint,gaidarenko/stylelint,stylelint/stylelint,evilebottnawi/stylelint,gucong3000/stylelint,heatwaveo8/stylelint