* crypto/keys: improve documentation
Remove out of date crypto/keys README.md file.
Populate client keys commands help screen with
more information regarding keyring backends.
* Fix formatting
* Fix lint warning
* Bump Tendermint version to v0.33.0
* Deprecate old cmn package with new packages
* Update update DB APIs
* More DB updates
* Bump IAVL to v0.13.0
* Handle error returned by iavl.NewMutableTree
* Fix some IAVL stuffs
* Update IAVL
* More updates
* Passing tests
* Fix unit tests
Co-authored-by: Jack Zampolin <jack.zampolin@gmail.com>
Client commands accept a new `--keyring-backend` option through which users can specify which backend should be used by the new key store:
- os: use OS default credentials storage (default).
- file: use encrypted file-based store.
- test: use password-less key store (highly insecure).