v0.5.0

Changes

• Build and test with the Go 1.27 toolchain. The go directive stays at 1.25.6, so the minimum Go version for module consumers is unchanged. (#30)
• gnata.wasm is now built with Go 1.27, matching the standard library (Unicode 17, encoding/json, regexp) used by current native builds. Evaluation is about 2× faster; the file is about 200 KB larger (brotli) and peak memory is higher on large inputs.
• CI runs the full test suite as js/wasm under Node.
• npm: gnata-js@0.5.0