Allow side effects in link.update( )

[gaperton]

When you update the link to object or array, you still have to return the value.

link.update( obj => { delete obj[ key ]; return obj; } )

Which is not good. Stupid code is always not good. It should look (and still work) like this:

link.update( obj => delete obj[ key ]  )

Then it will be perfect. In the next minor version.

[gaperton]

Looks like it's impossible (or very hard) to do. Implemented proxy array and object methods instead in 1.3