set sideEffects = false to package.json for webpack treeshaking #681
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set sideEffects = false to package.json for webpack treeshaking optimizations: https://webpack.js.org/guides/tree-shaking/
see also https://webpack.js.org/guides/tree-shaking/#mark-the-file-as-side-effect-free
i've checked all code, and i've not found any side effects on modules initialization (access to globals like window/document, css module imports etc).
this means that we can set sideEffects flag to false and have size optimizations in bundles, using react-stockcharts