0.3.20

Compatible with cardano-wallet@v2022-04-27.

What's new:

• Support for newly added endpoints:
  • https://input-output-hk.github.io/cardano-wallet/api/edge/#operation/postPolicyId
  • https://input-output-hk.github.io/cardano-wallet/api/edge/#operation/postPolicyKey
  • https://input-output-hk.github.io/cardano-wallet/api/edge/#operation/getPolicyKey
  • https://input-output-hk.github.io/cardano-wallet/api/edge/#operation/submitTransaction