Release 0.2.0-alpha.0

This release is an alpha containing the new build setup.

• add esbuild-jest (4e2cb53)
• add release:alpha script (fef228e)
• compile css separately (8ed054e)
• switch to exbuild (2546e2b)
• fix dita dep (85fb9e8)
• extract css, move react to peer dep (2b02df7)