Automated Changelog Entry for 7.0.0 on master

[blink1073]

closes #642

[blink1073]

cc @davidbrochart @kevin-bates for approval, then I'll cut the release

[kevin-bates]

@blink1073 - Thanks for putting this together and driving this process! This looks good.

I believe the specifics of the method signature changes are only documented in this comment as I wasn't sure how they'd be officially coordinated.

Does this discussion about adding a message-based interrupt into KernelClient warrant a delay? ipython/ipykernel#741 (comment)

[blink1073]

I believe the specifics of the method signature changes are only documented in this comment as I wasn't sure how they'd be officially coordinated.

Ah, thank you, I think we can fold those changes into this change log entry.

Does this discussion about adding a message-based interrupt into KernelClient warrant a delay? ipython/ipykernel#741 (comment)

Yes, let's hold off a bit

[blink1073]

Actually, I'll make a separate transition guide and link to it to keep the changelog more focused

[blink1073]

I've updated the changelog to refer to the new migration guide from #681.

[blink1073]

@ccordoba12, are you planning to address ipython/ipykernel#741 (comment) within the next couple days? If not we can plan to include it in a 7.1 release.

[kevin-bates]

Thank you Steve.

[blink1073]

I plan to cut 7.0 final release tomorrow

[blink1073]

Release time!