Update post object

[AndyEPhipps]

As per @corinja 's request to make everything nice and dynamic, and easily iterate-over-able:

let postBody = {
  transSourceURL: 'https://www.comicrelief.com/eligibility-checker',
  campaign: 'CR',
  transSource: 'CR_GrantsEligibility',
  timestamp: 362386858989,
  submission: {
    success: (isSuccessful ? 1 : 0),
    organisation: allResponses.organisation,
    income: allResponses.income,
    locationWeFund: allResponses['location-we-fund'],
    sportForChange: allResponses['sport-for-change'],
    activityWeDontFund: allResponses['activity-we-dont-fund'],
  },
};