* feat: add exporting/importing of ed25519 keys in libp2p-key format
* feat: add libp2p-key export/import support for rsa and secp keys
* chore: dep bumps
* chore: update aegir
* refactor: import and export base64 strings
* refactor: simplify api for now
* chore: fix lint
* refactor: remove extraneous param
* refactor: clean up
* fix: review patches
