fix deps for proton on assembly
update release notes
update to 2.4.0.Beta1
Revert "update to 2.4.0.Beta1"

This reverts commit 94db7c69e46d7b5b5cb14ba8724916c666cfcfec.
Merge pull request #1228 from andytaylor/master

stuff for 2.4.0.Beta1 release