When there is a diff version 1.* used somewhere in another package, the v1 is used by pdiff and there's an exception

Uncaught TypeError: Cannot read property 'Symbol(Symbol.iterator)' of undefined

use something like ^2.0.0 in the deps instead of *

• lhs

{
  private: true
}

• rhs

{
}

The algorithm used in this paper might be useful for this package.

I think the following components are required:

1. Code Analyser
   • Analyse the source code, and output the tree (like AST)
2. Tree Matching Algorithm
   • Receive two trees and calculate the matching of them
3. Textual Diff Algorithm

Define the command line tool.

• lhs

{
  foo: 0
}

• rhs

{
  foo: 0,
  bar: 1
}

diff should be insert ",\n bar:1".