Variable VERSIONConst

Current SDK version. Read directly from package.json so there is no second-source-of-truth to keep in sync — bumping version in package.json automatically propagates here, into the SDK's User-Agent header, and into the published artifact.

Works in every runtime the SDK targets:

• Node 22+, Bun, Deno: native JSON import attributes.
• Vite / esbuild / rollup builds: the JSON import is statically inlined as a JS module exporting the parsed object.
• Vitest browser mode: Vite handles the import the same way as build.