v3.0.0

What's Changed

• switch to yarn
• upgrade deps, babelrc, webpack conf
• switch circleci to github action
• switch to pchen66/panolens
• import PANOLENS and split vendor chunk
• correct imports and override process.env
• switch circleci to github action
• fix mocha setup

Full Changelog: v2.0.0...v3.0.0

v2.0.0

• updated panolens.js
• updated gh-pages branch