vivaldi-snapshot.rb: upgrade to v1.0.249.12
vivaldi-snapshot.rb: upgrade to v1.0.249.12

dictcp/homebrew-versions,elovelan/homebrew-versions,tomschlick/homebrew-versions,coeligena/homebrew-verscustomized,lukaselmer/homebrew-versions,chadcatlett/caskroom-homebrew-versions,noamross/homebrew-versions,pquentin/homebrew-versions,lukasbestle/homebrew-versions