0.9.0

Features

Main feature of this release is an API for Kotlin libraries that simplifies a kernel integration for them (#99). Special Gradle plugin is provided for this purpose. It enables the dependency on kotlin-jupyter-api artifact which allows a library writer to add a kernel integration by implementing one of LibraryDefinition or LibraryDefinitionProvider interfaces. You may find a minimal example in docs. For more "real-world" example see the integration for Kotlin dataframe library
Add handling clients with allow_stdin=false (#124)
Update library descriptors for Lets-Plot, Kravis (#118) and kaliningraph
Add enhanced support of typed dataframes (dataframe library)
Add jDSP library descriptor (#114)
Add possibility of kernel embedding (#102)
Provide completion and errors analysis for commands
Add support for minKernelVersion field in library descriptors
Formalise kernel versions format and ordering
Add possibility to provide shutdown hooks in library descriptors (#87)
Switch to the latest development version of Kotlin 1.5

Bugs

Fix completion bug in Notebook client (#113)
Fix irrelevant error popups in Notebook client (#109)
Improve and fix parsing of %use magic (#110)
Add resolution of transitive dependencies with runtime scope (previously only compile dependencies were resolved)
Fix "leaking" of kernel stdlib into script classpath (#27)
Fix added repositories ordering (#107)

Internal things / infrastructure

Add parallel testing
Upgrade Gradle
Add ktlint check
Add README generation from library descriptors and magics/commands descriptions
Distribute kotlin-jupyter-shared-compiler artifact which may be used for building scripting compilers with Jupyter dialect, including compilers inside IDEA