:new: Add onDidUpdateMessages method
:new: Add onDidUpdateMessages method

steelbrain/linter,DanPurdy/linter,levity/linter,AtomLinter/Linter,AsaAyers/linter,UltCombo/linter,atom-community/linter,blakeembrey/linter,shawninder/linter,e-jigsaw/Linter,JohnMurga/linter,Arcanemagus/linter