API-1628 - Creates a mechanism to build a contract map for releases.

[blurpesec]

Description

Creates a script that builds the contract map that is roughly logically equivalent to the previous one, just using CAIP-19 IDs for the keys in the map. This PR also contains tests for it.

It ends up looking like this:

{
  'eip155:1/erc20:0xff56Cc6b1E6dEd347aA0B7676C85AB0B3D08B0FA': {
    name: 'Orbs',
    symbol: 'ORBS',
    decimals: 18,
    erc20: true,
    logo: './icons/eip155:1/erc20:0xff56Cc6b1E6dEd347aA0B7676C85AB0B3D08B0FA.svg'
  }
}