[ANN] ipykernel 6.4.0

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Enhancements made

• Make json_clean a no-op for jupyter-client >= 7 #708 (@martinRenou)

Bugs fixed

• Do not assume kernels have loops #766 (@Carreau)
• Fix undefined variable #765 (@martinRenou)

Maintenance and upkeep improvements

• Make ipykernel work without debugpy #767 (@frenzymadness)
• Stop using deprecated recv_multipart when using in-process socket. #762 (@Carreau)
• Update some warnings with instructions and version number. #761 (@Carreau)

Contributors to this release

(GitHub contributors page for this release)

@Carreau | @frenzymadness | @martinRenou | @minrk

Full release notes are here