Block Header Modification

[alanorwick]

Quai block headers must be updated to the following:

type Header struct {
    ParentHash  []common.Hash    `json:"parentHash"       gencodec:"required"`
    UncleHash   []common.Hash    `json:"sha3Uncles"       gencodec:"required"`
    Coinbase    []common.Address `json:"miner"            gencodec:"required"`
    Root        []common.Hash    `json:"stateRoot"        gencodec:"required"`
    TxHash      []common.Hash    `json:"transactionsRoot" gencodec:"required"`
    ReceiptHash []common.Hash    `json:"receiptsRoot"     gencodec:"required"`
    Bloom       []Bloom          `json:"logsBloom"        gencodec:"required"`
    Difficulty  []*big.Int       `json:"difficulty"       gencodec:"required"`
    Number      []*big.Int       `json:"number"           gencodec:"required"`
    GasLimit    uint64         `json:"gasLimit"         gencodec:"required"`
    GasUsed     uint64         `json:"gasUsed"          gencodec:"required"`
    Time        uint64         `json:"timestamp"        gencodec:"required"`
    Extra       []byte         `json:"extraData"        gencodec:"required"`
    MixDigest   common.Hash    `json:"mixHash"`
    Nonce       BlockNonce     `json:"nonce"`

    // BaseFee was added by EIP-1559 and is ignored in legacy headers.
    BaseFee *big.Int `json:"baseFeePerGas" rlp:"optional"`

    // New
    // Map the current Region / Zone 
    MapContext  []byte

    Location    []byte
}

In the following file:
https://github.com/spruce-solutions/go-quai/blob/0e2b90ec3f183c3112bc84e5d4db231a7454d52f/core/types/block.go#L73-L93

Tests that must be updated:
https://github.com/spruce-solutions/go-quai/blob/0e2b90ec3f183c3112bc84e5d4db231a7454d52f/core/types/block_test.go#L36
https://github.com/spruce-solutions/go-quai/blob/0e2b90ec3f183c3112bc84e5d4db231a7454d52f/core/types/block_test.go#L72
https://github.com/spruce-solutions/go-quai/blob/0e2b90ec3f183c3112bc84e5d4db231a7454d52f/core/types/block_test.go#L139
https://github.com/spruce-solutions/go-quai/blob/0e2b90ec3f183c3112bc84e5d4db231a7454d52f/core/types/block_test.go#L208
https://github.com/spruce-solutions/go-quai/blob/0e2b90ec3f183c3112bc84e5d4db231a7454d52f/core/types/block_test.go#L231