Implement `Display` for IdentificationMethod

[0xB10C]

rust-bitcoin-pool-identification/src/lib.rs

Lines 86 to 92 in bb2faaf

	#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
	pub enum IdentificationMethod {
	/// The [Pool] was identified via a known coinbase output address.
	Address,
	/// The [Pool] was identified via a known tag in the coinbase script sig.
	Tag,
	}

This would better allow logging the IdentificationMethod