v0.10.3-rc.3

What's Changed

• feat(proving-api): add opaque additional_data to proveTransaction result by @avi-starkware in #389
• wallet-api: clarify STRK20 open-note ("OPEN" amount) semantics and enforcement by @odednaor in #395
• feat(wallet-api): full semver in version schemas, bump spec to 0.10.3-rc.2 by @odednaor in #396
• fix(wallet-api): disallow prerelease in API_VERSION pattern by @odednaor in #397
• bump: v0.10.3-rc.3 by @odednaor in #398

Full Changelog: v0.10.3-rc.2...v0.10.3-rc.3