Update function

Add an update function that is passed an updater function which will be provided with the returned proxy key, and returns a new value.

#3

Set creates arrays only for integer keys

The set function now only creates arrays when the key represents a valid integer

#2

Fix release

Previously was not publishing built code due to gitignore

Set function

Add set function to immutably set values in a nested object

#1

Initial release

v0.0.1

0.0.1