v0.9.30

ChainRulesCore v0.9.30

Diff since v0.9.29

Closed issues:

• Design docs on Primal computations that do not simply call the primal function (#251)
• Some potential improvements for the docs (#313)

Merged pull requests:

• Fix rrule of sum3 example (#307) (@niklasschmitz)
• Avoid unnecessary keyword arguments check in fallback rrule (#308) (@Keno)
• fix some typos in docs (#310) (@mzgubic)