2.1.0

Features

• Use esbuild incremental API (#20, thanks @jridgewell)
• Don't store map string to save a bit of memory (#15, thanks @jridgewell)

Bug Fixes

• Eliminate the test files from the Karma runner (#16, thanks @jridgewell)
• Fix bundle output when there's an error (#17, thanks @jridgewell)

Maintenance

• Include typescript test (#14, thanks @jridgewell)