Remove kotlin-js-store from gitignore

The official docs[1] recommend comitting the kotlin-js-store directory
and its contents to ensure the application is being built with the same
dependency tree on all machines.

[1] https://kotlinlang.org/docs/js-project-setup.html#version-locking-via-kotlin-js-store

Author: michaelbull

.gitignore

@@ -21,7 +21,6 @@ out/
 
 # Gradle
 build/
-kotlin-js-store/
 local.properties
 
 # JVM error logs