chore(release): 3.18.1 [skip ci]

## [3.18.1](watson-developer-cloud/node-sdk@v3.18.0...v3.18.1) (2019-02-14)

### Bug Fixes

* use dotenv v5 to maintain node 4.x compatibility ([c311651](watson-developer-cloud@c311651))

chore(release): 3.18.0 [skip ci]

# [3.18.0](watson-developer-cloud/node-sdk@v3.17.0...v3.18.0) (2019-02-06)

### Features

* **compare-comply:** new constants and new model properties added ([d9dc7cc](watson-developer-cloud@d9dc7cc))
* **discovery:** add method `getStopwordListStatus` ([ea9eaf9](watson-developer-cloud@ea9eaf9))
* **speech-to-text:** optional parameter `force` added to the method `upgradeAcousticModel` ([ceaa843](watson-developer-cloud@ceaa843))

chore(release): 3.17.0 [skip ci]

# [3.17.0](watson-developer-cloud/node-sdk@v3.16.1...v3.17.0) (2019-02-04)

### Features

* enable reading credentials from ibm-credentials.env file ([ce02aa8](watson-developer-cloud@ce02aa8))

chore(release): 3.16.1 [skip ci]

## [3.16.1](watson-developer-cloud/node-sdk@v3.16.0...v3.16.1) (2019-01-19)

### Bug Fixes

* fix `getTransactionId` method for the `RecognizeStream` class ([e5bbe2c](watson-developer-cloud@e5bbe2c))

chore(release): 3.16.0 [skip ci]

# [3.16.0](watson-developer-cloud/node-sdk@v3.15.4...v3.16.0) (2019-01-17)

### Features

* **discovery:** add methods `createStopwordList`, `deleteStopwordList`, `createGateway`, `deleteGateway`, `getGateway`, and `listGateways` ([8a6753e](watson-developer-cloud@8a6753e))
* **speech-to-text:** new methods added: addGrammar, deleteGrammar, getGrammar, listGrammars ([7ab567a](watson-developer-cloud@7ab567a))
* **visual-recognition:** parameter `accept_language` added to method `detectFaces` ([82190c7](watson-developer-cloud@82190c7))

chore(release): 3.15.4 [skip ci]

## [3.15.4](watson-developer-cloud/node-sdk@v3.15.3...v3.15.4) (2019-01-15)

### Bug Fixes

* fix bug that prevents `audio` from being sent as a buffer for `recognize` ([3f97b80](watson-developer-cloud@3f97b80))

chore(release): 3.15.3 [skip ci]

## [3.15.3](watson-developer-cloud/node-sdk@v3.15.2...v3.15.3) (2019-01-15)

### Bug Fixes

* package.json to reduce vulnerabilities ([e61d1de](watson-developer-cloud@e61d1de))

chore(release): 3.15.2 [skip ci]

## [3.15.2](watson-developer-cloud/node-sdk@v3.15.1...v3.15.2) (2019-01-14)

### Bug Fixes

* query parameters no longer cause text-to-speech over websockets to crash ([775e6d2](watson-developer-cloud@775e6d2))
* Remove the `disabled` property from `CreateDialogNode`. It is for internal use only. ([4b72d0e](watson-developer-cloud@4b72d0e))

chore(release): 3.15.1 [skip ci]

## [3.15.1](watson-developer-cloud/node-sdk@v3.15.0...v3.15.1) (2019-01-07)

### Bug Fixes

* add `disabled` property to CreateDialogNode ([41cd8dc](watson-developer-cloud@41cd8dc))
* add `user_defined` property to MessageOutput model ([ea28bf3](watson-developer-cloud@ea28bf3))

chore(release): 3.15.0 [skip ci]

# [3.15.0](watson-developer-cloud/node-sdk@v3.14.0...v3.15.0) (2018-12-07)

### Features

* add support for Compare and Comply service ([fa22ae5](watson-developer-cloud@fa22ae5))
* **discovery:** adds new model, RetrievalDetails ([1821719](watson-developer-cloud@1821719))
* **natural-language-understanding:** new properties added to models to match the service ([3bf1e5e](watson-developer-cloud@3bf1e5e))