v2.3.0

NPM release: https://www.npmjs.com/package/@fermyon/spin-sdk/v/2.3.0

What's Changed

• add spin 3 interfaces and bump version number by @karthik2804 in https://github.com/fermyon/spin-js-sdk/pull/291
• fix kv serialization and bump package version by @karthik2804 in https://github.com/fermyon/spin-js-sdk/pull/292
• bump js sdk to version 2.3 by @karthik2804 in https://github.com/fermyon/spin-js-sdk/pull/294

Full Changelog: fermyon/spin-js-sdk@v2.2.0...v2.3.0