Update changelog.
Update changelog.

mrcslws/gorilla-repl,mrcslws/gorilla-repl,gorillalabs/gorilla-repl,deas/gorilla-notebook,JonyEpsilon/gorilla-repl,deas/gorilla-notebook,JonyEpsilon/gorilla-repl,deas/gorilla-notebook,deas/gorilla-notebook,gorillalabs/gorilla-repl