FIX: Filtering source_amount pathfind correctly

[alandotcom]

Bug:

api.connect().then(() => {
  const pathfind = {
    source: {
      address: USDCold,
      amount: {
        currency: 'USD',
        value: '1.00' // <<<< Rippled response has "1" not "1.00"
      }
    },
    destination: {
      address: EURCold,
      amount: {currency: 'EUR'}
    }
  };
  return api.getPaths(pathfind).then(paths => {
    console.log('PATHS: \n', JSON.stringify(paths, null, 2));
  });
}).catch(console.log);

[alandotcom]

Working on a unit test

[alandotcom]

Updated unit test

[clark800]

LGTM