Jupyter Notebook 7 beta is released

[jitseniesen]

Tasks:

• Update to Jupyter Notebook 7.0.0a16
• Update to Jupyter Notebook 7.0.0a17
• Update to Jupyter Notebook 7.0.0a18
• Update to Jupyter Notebook 7.0.0b0
• Use conda packages instead of pip
• Consider dependabot security alerts
  • Update merge to 2.1.1 if possible
  • Bump webpack from 5.75.0 to 5.76.0