v0.2.1

What's Changed

• Extract serialization into separate crate by @jeffcharles in #81
• Make serde code private to crate by @jeffcharles in #85
• Add README and some cargo fields for quickjs-wasm-rs by @jeffcharles in #84
• Add some release instructions to the readme by @jianghong in #86
• Include quickjs-wasm-rs tests in Makefile by @jeffcharles in #90
• Flush to stdout in engine.store by @jianghong in #89
• Send console.log and console.error to stderr by @jianghong in #88

Full Changelog: v0.2.0...v0.2.1