Namada 0.20.0

Namada 0.20.0 is a minor release addressing several improvements to the PoS system and the ledger
stability.

BUG FIXES

• Fix genesis faucet_withdrawal_limit parser to respect tokens' denomination.
  (#1667)
• PoS: ensure that the size of genesis validator set
  is limited by the max_validator_slots parameter.
  (#1686)
• Fix inconsistency state before commit
  (#1709)
• PoS: Fixed an epoch boundary issue in which a validator who's being slashed
  on a start of a new epoch is disregarded during processing of block votes.
  (#1729)

IMPROVEMENTS

• PoS: purge validator sets for old epochs from the storage; store total
  validator stake (#1129)
• Added a reusable token balance query method.
  (#1173)
• Replaced file-lock with fd-lock dependency to support Windows build.
  (#1605)
• Added a command to wait for the next epoch: client utils epoch-sleep.
  (#1621)
• Added a client query for validator-state and improved the slashes query to
  show more info. (#1656)
• Removed associated type on masp::ShieldedUtils. This type was an
  attempt to reduce the number of generic parameters needed when interacting
  with MASP but resulted in making code re-use extremely difficult.
  (#1670)
• Removed impl From<u64> for EthBridgeVotingPower and replaced it with a
  TryFrom. (#1692)
• Updated sysinfo dependency.
  (#1695)
• Refactored storage code to only use an immutable reference when reading and
  writing to a batch. (#1717)

MISCELLANEOUS

• Replaced token sub-prefix with a multitoken address and native VP for IBC and
  ETH bridge. (#1693)
• PoS: Keep the data for last two epochs by default.
  (#1733)
• Refactored CLI into libraries for future re-use in integration tests and
  to enable generic IO. (#1738)

TESTING

• Added integration testing infrastructure for node, client and
  the wallet and replaced MASP E2E tests with integration tests.
  (#1714)