What happens if you stick with 0.11.2 - the last version that was released under the Apache 2.0 license? This specific license should allow you to make modifications like bug fixes or some other incremental improvements.
The existence of prior art is also interesting especially in the case with Immutable.js which is basically a JavaScript implementation of common data structures and algorithms.
The existence of prior art is also interesting especially in the case with Immutable.js which is basically a JavaScript implementation of common data structures and algorithms.