#359: Constraints in state objects

I made the changes for #359. I produced a change draft,

https://github.com/oasis-tcs/sarif-spec/blob/master/Documents/ChangeDrafts/Accepted/sarif-v2.0-issue-359-state-constraints.docx

merged it into the provisional draft,

https://github.com/oasis-tcs/sarif-spec/blob/master/Documents/ProvisionalDrafts/sarif-v2.0-csd02-provisional.docx

and closed the issue.

Let me know if you find typos or have editorial changes to suggest, but otherwise, I consider this issue closed.

Thanks,
Larry