Handle bip137

[RyanKung]

    #[test]
    fn test_verify_bip137() {
	// The sig is created by unisat.
	// let sig = await window.unisat.signMessage("hello world");
	// sig = "G4j29m8WutQfZJaonWuXLoXhlhlPfJzbN/Vmz2hdiAYwFMpvTPZslHaOBaotsFfkN26KpaCF3Az0ooUr6vMbNBg="
	// signer = "bc1p43s0vyuq6wvsfqmw5vd2thhv5pg755ekasw2y8jwh754ezdayfkqvsrama"

	let msg = "hello world";
	let sig_b64 = "G4j29m8WutQfZJaonWuXLoXhlhlPfJzbN/Vmz2hdiAYwFMpvTPZslHaOBaotsFfkN26KpaCF3Az0ooUr6vMbNBg=";
	let mut sig: Vec<u8> = general_purpose::STANDARD.decode(sig_b64).unwrap();
	assert_eq!(sig.len(), 65);
	sig.rotate_left(1);
	assert_eq!(sig[64], 27);
	let pk = ecdsa::recover(msg, sig).unwrap();
    }

For now, it's using eip191 to handle the recover_id.