Fixes
- fix IllegalStateException on shutdown https://github.com/thheller/shadow-cljs/issues/223 https://github.com/thheller/shadow-cljs/commit/aff3f442b264bec7ce6f10b911ac9ba768cd2f73
- ensure cache invalidation when closure version is manually changed https://github.com/thheller/shadow-cljs/commit/7bb507b33dbfd0dd8fffcde53b4d5d067eb85171