This branch adds apatch function to the public API.

Its purpose is to allow the editing of a JSON5 object while preserving the comments in the file.
The API works like this.

letjson5Text=`  {    hello: 'world' // this is a comment  }`json5.patch(json5Text,{hello:'world',my:'friend'})/* returns a string like this`  {    hello: 'world', // this is a comment    my: 'friend'  }`*/

Note that the comment is still present in the string. The above example is the most simple I can imagine, but it should work in many other cases that I mean to cover in the tests.

What do you think? Would you be welcoming such an addition@jordanbtucker ?
Happy to ultimate the work if so and I'll close the PR if you believe that it's out of the scope of this library.

Mentioning that:

• this is something thatcomment-json provides, but without JSON5
• this work comes almost entirely by looking atgolden-fleece by Rich Harris
• Options for preserving comments when editing a JSON5 file by script #177