v0.2.0

Bug Fixes

• add remark (7e93e3c)
• build script (e449e07)
• change onscroll to onbeforeunload (c4e61ab)
• update webpack babel to latest version (04dbd28)
• use addEventListener to prevent affecting the other onscroll event (37f9b23)

Features

• add changelog (f4d25c5)
• add rollup & babel-transform-runtime (3ad9303)
• add sideEffect:false (9771fdc)