Add Digi-Key (#2638)

README.md

@@ -1280,6 +1280,7 @@ API | Description | Auth | HTTPS | CORS |
 API | Description | Auth | HTTPS | CORS |
 |---|---|---|---|---|
 | [Best Buy](https://bestbuyapis.github.io/api-documentation/#overview) | Products, Buying Options, Categories, Recommendations, Stores and Commerce | `apiKey` | Yes | Unknown |
+| [Digi-Key](https://www.digikey.com/en/resources/api-solutions) | Retrieve price and inventory of electronic components as well as place orders | `OAuth` | Yes | Unknown |
 | [Dummy Products](https://dummyproducts-api.herokuapp.com/) | An api to fetch dummy e-commerce products JSON data with placeholder images | `apiKey` | Yes | Yes |
 | [eBay](https://go.developer.ebay.com/) | Sell and Buy on eBay | `OAuth` | Yes | Unknown |
 | [Etsy](https://www.etsy.com/developers/documentation/getting_started/api_basics) | Manage shop and interact with listings | `OAuth` | Yes | Unknown |