message: Update ZEC consensus-branch-id for "Canopy" hard fork
  TICKET:
diff: @@ -175,7 +175,8 @@ module.exports = {
  3: 0x5ba81b19,
  // 4: 0x76b809bb (old Sapling branch id). Blossom branch id becomes effective after block 653600
  // 4: 0x2bb40e60
  - 4: 0xf5b9230b
  + // 4: 0xf5b9230b (Heartwood branch id, see https://zips.z.cash/zip-0250)
  + 4: 0xe9ff75a6 // (Canopy branch id, see https://zips.z.cash/zip-0251)
  },
  coin: coins.ZEC
  },
  @@ -191,7 +192,8 @@ module.exports = {
  3: 0x5ba81b19,
  // 4: 0x76b809bb (old Sapling branch id)
  // 4: 0x2bb40e60
  - 4: 0xf5b9230b
  + // 4: 0xf5b9230b (Heartwood branch id, see https://zips.z.cash/zip-0250)
  + 4: 0xe9ff75a6 // (Canopy branch id, see https://zips.z.cash/zip-0251)
  },
  coin: coins.ZEC
  }
  