Upgrade Yarn off of classic #898

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5 errors and 1 warning

Cannot find name 'WeakMap'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2015' or later.

Cannot find name 'Map'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2015' or later.

Cannot find name 'Map'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2015' or later.

Cannot find name 'IterableIterator'.

Process completed with exit code 2.

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/setup-node@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.