About itk 5.4.0

[chenrui333]

Release checklist and status:

• [x] Check dashboard and CI
• [x] Tag the ITK repository
• [x] Bump ITK's version
• [x] Update release branches
• [x] Update .zenodo.json
• [x] Bump the ITKPythonPackage version
• [x] Bump the ITKSoftwareGuide version
• [ ] Bump ITKSphinxExamples version: WIP: https://github.com/InsightSoftwareConsortium/ITKSphinxExamples/pull/424
• [x] Generate InsightToolkit and InsightData tarballs
• [x] Archive testing data
• [ ] Write release notes
• [ ] Tarballs archived on ITK data.kitware.com Releases
• [ ] Publish Doxygen HTML
• [x] Generate Python packages and ITKPythonBuilds
• [x] Upload Python packages to PyPI
• [x] conda-forge libitk package updated
• [ ] Post on Discourse
• [ ] Post on Kitware Blog

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👋 looks like 5.4.0 did not get marked as latest release? Create this issue to raise some awareness. Thanks!

cc @phcerdan

[thewtex]

Hello, we are finalizing the release artifacts and the release announcement, and a GitHub Release will be minted after all these are in place. Thanks for helping with the Homebrew package :pray: