Add info about redFlags (#376)

Author: 409H

README.md

@@ -29,6 +29,7 @@ This web tool should help getting the checksum: https://ethsum.netlify.com
 -  `community`: Twitter, Reddit, Slack or wherever else people hang out.
 -  `website`:   Official URL of the website.
 -  `address_eip1191`: Ethereum (or other chain) address of ERC-20 token, in [EIP-1191](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1191.md) mixed-case format.
+- `redFlags`: An array containing evidence on why the contract should be treated with caution. Example: `[{"type": "suspicious","comment": "fake scam token","url": "https://some.evidence"}]`
 
 # The assembled lists