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Update rollup

Merge pull request #69 from hcodes/fix_resize

Improve positioning of snowflakes when resizing the window.

Merge pull request #66 from hcodes/fix_doc

Fix for server rendering

Merge pull request #65 from hcodes/random

Improved randomization of snowflake positions

Merge pull request #61 from hcodes/autoresize

Add autoResize param

Update CHANGELOG.md

Update README.md

Add github action

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