Features:

• Add support for .txt dependencies in Python #1357
• Add log verbosity configuration #1380 (thanks @dhia-gharsallaoui)

Bugfixes:

• Fix an issue preventing the creation of zombie kernels by adding a KeepAlive between kernel <-> server #1319
• Add stylesheet versions to bust the CSS cache on new version deployments #1136
• Fix an issue where panels can be dragged to a negative width and then couldn't be adjusted again #1335
• Add an error message on config paste failure #1375
• Fix a bug where execution info was copied when a new cell was inserted without being explicitly requested #1392

Misc:

• Upgrade Monaco version, adding support for various new Monaco features and fixing some longstanding editor bugs #457 #1382
• Upgrade Webpack version to fix CI failures #1388

A special thanks to first-time contributor @dhia-gharsallaoui in this release!