Add a way to find out the original range of characters for an AST node

Describe the bug
I have a use case where I would like to use node-sql-parser for syntax highlighting. For this, I would need to have access to the range of characters in the original string that correspond to parsed AST nodes. It looks like Peg.js makes this information available as a 'location' variable in the parser functions (see https://pegjs.org/documentation).

Adding this should therefore pretty easy. I am not that familiar with the node-sql-parser codebase, but would love to give it a shot if someone can give me some pointers on how this should be implemented.
Expected behavior

For each AST node, have a start and end property indicating the character range in the parsed SQL that maps to the AST node.