[VEN-2843] Upgrade implementation of vToken contracts · VenusProtocol/isolated-pools@d012a2a

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2, actions/setup-node@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

The following actions use a deprecated Node.js version and will be forced to run on node20: actions/checkout@v2, actions/setup-node@v2. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

Immutable variables name are set to be in capitalized SNAKE_CASE

Variable "redeemAmount" is unused

Variable "redeemTokens" is unused

Use Custom Errors instead of require statements

Use Custom Errors instead of require statements

Use Custom Errors instead of require statements

Use Custom Errors instead of require statements

Use Custom Errors instead of require statements

Use Custom Errors instead of require statements

Use Custom Errors instead of require statements

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