Make tagName matching case-insensitive in areElementsMergeable
Make tagName matching case-insensitive in areElementsMergeable

emil-mi/rangy,sashless/rangy,zimme/rangy,KamiHQ/rangy,etodd/rangy,GerHobbelt/Rangy,yangdm2015/vue-rangy,brymacto/rangy,shuizhongyueming/rangy,timdown/rangy,izhan/rangy,wotzisname/rangy,shuizhongyueming/rangy,etodd/rangy,brymacto/rangy,lpsBetty/rangy,emil-mi/rangy,zimme/rangy,lpsBetty/rangy,wotzisname/rangy,GerHobbelt/Rangy,yangdm2015/vue-rangy,izhan/rangy,KamiHQ/rangy,djbuch/rangy,djbuch/rangy,timdown/rangy,sashless/rangy