Update to 3.6.0

[jbaublitz]

Required for part 2 of #3285

[jbaublitz]

@mulkieran I think this is either a real failure in the way the test for signals is written or in my update. Do you know which it is? I think I found the place that needs to be edited in the testing repo when we bump a revision version.

[mulkieran]

@jbaublitz Plz rebase when you get the chance.

[mulkieran]

@jbaublitz Plz rebase.

[jbaublitz]

Rebased.