Added LibreTranslate to list (#1994)

* Added LibreTranslate to list

* link now goes to documentation page
Co-authored-by: Pawel Borkar <36134699+pawelborkar@users.noreply.github.com>

README.md

@@ -1081,6 +1081,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Cloudmersive Natural Language Processing](https://www.cloudmersive.com/nlp-api) | Natural language processing and text analysis | `apiKey` | Yes | Yes |
 | [Detect Language](https://detectlanguage.com/) | Detects text language | `apiKey` | Yes | Unknown |
 | [Google Cloud Natural](https://cloud.google.com/natural-language/docs/) | Natural language understanding technology, including sentiment, entity and syntax analysis | `apiKey` | Yes | Unknown |
+| [LibreTranslate](https://libretranslate.de/docs) | Translation tool with 17 available languages | No | Yes | Unknown |
 | [Semantria](https://semantria.readme.io/docs) | Text Analytics with sentiment analysis, categorization & named entity extraction | `OAuth` | Yes | Unknown |
 | [Sentiment Analysis](https://www.meaningcloud.com/developer/sentiment-analysis) | Multilingual sentiment analysis of texts from different sources | `apiKey` | Yes | Yes |
 | [Sentium](https://sentim-api.herokuapp.com/) | Free API for Text Sentimental analysis | No | Yes | Unknown |