ES: issued At & expiration time are using doubles instead of ints

[vanlooverenkoen]

As stated in this issue #233 some test files are still using doubles instead of ints for ES

The issued at is still a double.
testfile: 1101.json

{
  1: ES,
  4: 1777072237,
  6: 1621844298.68,
  -260: {
    1: {
      v: [
        {
          ci: 01ES11VBB823DB3EB6D47BA11F09#5,
          co: ES,
          dn: 2,
          dt: 2021-02-06,
          is: ServicioExtremeñodeSalud,
          ma: 729999,
          mp: 729999,
          sd: 2,
          tg: 729999,
          vp: 729999
        }
      ],
      dob: 1989-04-27,
      nam: {
        fn: MARQUEZSANCHEZ,
        gn: JULIA,
        fnt: MARQUEZ<SANCHEZ,
        gnt: JULIA
      },
      ver: 1.0.0
    }
  }
}

Apparently, 1101.json is not the only one I will create a list with all the files that are still using doubles for ES

• 1101.json (issued at only)
• 401.json (both expiration & issued at)
• 1002.json (issued at only)
• 1501.json (both expiration & issued at)
• 502.json (issued at only)
• 703.json (both expiration & issued at)
• 702.json (both expiration & issued at)
• 201.json (both expiration & issued at)
• 503.json (issued at only)
• 1003.json (issued at only)
• 1503.json (both expiration & issued at)
• 701.json (both expiration & issued at)
• 202.json (issued at only)
• 501.json (issued at only)
• 203.json (both expiration & issued at)
• 1001.json (issued at only)
• 1502.json (both expiration & issued at)
• 402.json (both expiration & issued at)
• 1102.json (issued at only)
• 1103.json (issued at only)
• 403.json (both expiration & issued at)