Cloud Natural Language API v1beta2 release. Added beta support for entity, sentiment, and syntax analysis for the following languages

## Feature Cloud Natural Language API `v1beta2` release. Added beta support for entity, sentiment, and syntax analysis for the following languages: \* Chinese (Simplified and Traditional) \* French \* German \* Italian \* Korean \* Portuguese ## Feature Added beta support for entity sentiment analysis (`analyzeEntitySentiment`). Entity sentiment analysis is currently only available for the English language. For more information, see [Entity Sentiment Analysis](https://cloud.google.com/natural-language/docs/basics#entity-sentiment-analysis). ## Change The `v1beta2` release includes updated document sentiment analysis. You might see differing results from the same request made to the Natural Language API `v1` and `v1beta2` releases. ## Change The `v1beta2` release includes updated entity analysis. You might see minor differences in metadata (Wikipedia URLs, knowledge graph MIDs) from the same request made to the Natural Language API `v1` and `v1beta2` releases. ## Deprecate The Natural Language API `v1beta1` release has been deprecated.