Update Auth from No -> apikey (Fix #1726)

README.md

@@ -209,7 +209,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Bitmex](https://www.bitmex.com/app/apiOverview) | Real-Time Cryptocurrency derivatives trading platform based in Hong Kong | `apiKey` | Yes | Unknown |
 | [Bittrex](https://bittrex.com/Home/Api) | Next Generation Crypto Trading Platform | `apiKey` | Yes | Unknown |
 | [Block](https://www.block.io/docs/basic) | Bitcoin Payment, Wallet & Transaction Data | `apiKey` | Yes | Unknown |
-| [Blockchain](https://www.blockchain.info/api) | Bitcoin Payment, Wallet & Transaction Data | No | Yes | Unknown |
+| [Blockchain](https://www.blockchain.com/api) | Bitcoin Payment, Wallet & Transaction Data | `apiKey` | Yes | Unknown |
 | [BlockFacts](https://blockfacts.io/) | Real-time crypto data from multiple exchanges via a single unified API, and much more | `apiKey` | Yes | Unknown |
 | [CoinAPI](https://docs.coinapi.io/) | All Currency Exchanges integrate under a single api | `apiKey` | Yes | No |
 | [Coinbase](https://developers.coinbase.com) | Bitcoin, Bitcoin Cash, Litecoin and Ethereum Prices | `apiKey` | Yes | Unknown |