Update EIP-5920: Move to Draft

[charles-cooper]

ATTENTION: ERC-RELATED PULL REQUESTS NOW OCCUR IN ETHEREUM/ERCS

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[eth-bot]

File EIPS/eip-5920.md

Requires 1 more reviewers from @Pandapip1, @SamWilsn, @xinbenlv
Requires 1 more reviewers from @g11tech, @lightclient, @SamWilsn