Add OpenFIGI (#2142)

README.md

@@ -532,6 +532,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Intrinio](https://intrinio.com/) | A wide selection of financial data feeds | `apiKey` | Yes | Unknown |
 | [Mono](https://mono.co/) | Connect with users’ bank accounts and access transaction data in Africa | `apiKey` | Yes | Unknown |
 | [Nordigen](https://nordigen.com/en/account_information_documenation/integration/quickstart_guide/) | Connect to bank accounts using official bank APIs and get raw transaction data | `apiKey` | Yes | Unknown |
+| [OpenFIGI](https://www.openfigi.com/api) | Equity, index, futures, options symbology from Bloomberg LP | `apiKey` | Yes | Yes |
 | [Plaid](https://plaid.com/) | Connect with users’ bank accounts and access transaction data | `apiKey` | Yes | Unknown |
 | [Polygon](https://polygon.io/) | Historical stock market data | `apiKey` | Yes | Unknown |
 | [Razorpay IFSC](https://ifsc.razorpay.com/) | Indian Financial Systems Code (Bank Branch Codes) | No | Yes | Unknown |