release: 81.0.0

[ccharly]

Description

This is the release candidate for version 81.0.0. See the CHANGELOGs for more details.

---

Note

Release 81.0.0 bumping @metamask/keyring-api to 21.3.0 with initial Keyringv2, new Tron signing methods, and related deprecations.

• Release/versioning
  • Bump monorepo version to 81.0.0 in package.json.
  • Bump @metamask/keyring-api to 21.3.0 in packages/keyring-api/package.json.
• Keyring API (21.3.0)
  • Added initial Keyringv2 interface.
  • Added Tron methods: signMessage, signTransaction.
  • Deprecated Tron methods: signMessageV2, verifyMessageV2.
  • Updated CHANGELOG.md entries and comparison links.

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