Release 0.15.1

This should fix extensions (previously 0.15.0 was trying to pull 0.14.0 extensions).

What's Changed

• fmt: fix python_format for poorly executed commit by @adsharma in #258
• wasm: handle JSON types as strings by @adsharma in #259
• ci: fix wasm warnings and syntax by @adsharma in #260

Full Changelog: v0.15.0...v0.15.1