no support for the new governance bech prefixes

[gitmachtl]

for the upcoming change in the governance/catalyst voting, a new bech prefix for public/private keys was defined. https://github.com/cardano-foundation/CIPs/pull/342

private/signing key prefix: gov_sk public/verification key prefix: gov_vk

however, these prefixes are not working with the current release of the cardano-serialization-lib in commands like .PublicKey.from_bech32(bechstr)

please add support for those new prefixes, we need it also for current testing.

or is the prefix limited to only ed25519_pk & ed25519_sk prefixes in general and all other prefixes must be encoded/decoded with a bech32 lib?