v0.9.0

What's Changed

• Make importmap paths configurable by @kirillplatonov in #62
• Add default support for the Propshaft asset pipeline by @rmacklin in #61
• Upgrade to es-module-shims 1.3.2 by @dhh in 2489bae
• Add sourcemap to minified default of es-module-shims by @dhh in 4e21177

Full Changelog: v0.8.2...v0.9.0