Improvements in koyo 0.9

Recently, Daniel Holtby improved the implementation of racket/rerequire, which, in turn, inspired me to improve koyo's own code-reloading implementation. Version 0.9 (released today) no longer restarts the application process on every change and, instead, uses dynamic-rerequire to only reload the modules that change as well as any modules that depend on them. On Matchacha, which is about 11k lines of Racket code (excluding whitespace), this improves reload times by 5 to 10x, depending on the modules being reloaded.

Additionally, I added support for augmenting existing REPL sessions with the functionality of raco koyo console via start-console-here.

You can see the two changes in action in this short screencast.