chore(release): 5.1.0 [skip ci]

# [5.1.0](watson-developer-cloud/node-sdk@v5.0.0...v5.1.0) (2019-10-07)

### Features

* **text-to-speech:** add method to repair wav header for a stream ([watson-developer-cloud#981](watson-developer-cloud#981)) ([42b0913](watson-developer-cloud@42b0913))

chore(release): 5.0.0-rc3 [skip ci]

chore(release): 5.0.0 [skip ci]

# [5.0.0](watson-developer-cloud/node-sdk@v4.5.1...v5.0.0) (2019-10-04)

### Bug Fixes

* make RecognizeStream.readableObjectMode always return Boolean ([watson-developer-cloud#943](watson-developer-cloud#943)) ([a276df4](watson-developer-cloud@a276df4))

### Build System

* drop support for Node versions 6 and 8 ([3ea1fd7](watson-developer-cloud@3ea1fd7))

### Code Refactoring

* change all websocket method parameters to lower camel case ([watson-developer-cloud#941](watson-developer-cloud#941)) ([cb6711f](watson-developer-cloud@cb6711f))

### Features

* add support for new authenticators in all sdks and add new service features for major release ([watson-developer-cloud#946](watson-developer-cloud#946)) ([3acffc5](watson-developer-cloud@3acffc5))

### BREAKING CHANGES

* Passing individual credentials to the service constructor will no longer work. An Authenticator must be initialized and passed in. For more information, see the migration guide.
* All parameters have been converted to their lower camel case version.
* Support for the `token` parameter has been removed
* Support for the `customization_id` parameter has been removed
* Method `setAuthorizationHeaderToken` has been removed from the WebSocket Stream classes
* `RecognizeStream.readableObjectMode` will always be a Boolean value - before, it could have been `undefined`.
* This SDK may no longer work with applications running on Node 6 or 8.

chore(release): 5.0.0-rc2 [skip ci]

chore(release): 4.5.1 [skip ci]

## [4.5.1](watson-developer-cloud/node-sdk@v4.5.0...v4.5.1) (2019-09-19)

### Bug Fixes

* pass user-defined http(s) agent to websocket methods ([watson-developer-cloud#953](watson-developer-cloud#953)) ([4f1679c](watson-developer-cloud@4f1679c))

chore(release): 4.5.0 [skip ci]

# [4.5.0](watson-developer-cloud/node-sdk@v4.4.0...v4.5.0) (2019-09-19)

### Bug Fixes

* ignore unecessary files for npm releases ([watson-developer-cloud#962](watson-developer-cloud#962)) ([93eb677](watson-developer-cloud@93eb677))

### Features

* separate strings out of primary SynthesizeStream pipe ([watson-developer-cloud#957](watson-developer-cloud#957)) ([3014478](watson-developer-cloud@3014478))

[skip-ci] v5.0.0-rc1

chore(release): 4.4.0 [skip ci]

# [4.4.0](watson-developer-cloud/node-sdk@v4.3.4...v4.4.0) (2019-08-20)

### Features

* **compare-comply:** new model ContractCurrencies added ([watson-developer-cloud#935](watson-developer-cloud#935)) ([132ad09](watson-developer-cloud@132ad09))

chore(release): 4.3.4 [skip ci]

## [4.3.4](watson-developer-cloud/node-sdk@v4.3.3...v4.3.4) (2019-08-13)

### Bug Fixes

* disable analytics headers in browser to fix cors issues ([bdcf9d6](watson-developer-cloud@bdcf9d6))
* disable analytics headers in browser to fix cors issues ([watson-developer-cloud#932](watson-developer-cloud#932)) ([bba47a0](watson-developer-cloud@bba47a0))

chore(release): 4.3.3 [skip ci]

## [4.3.3](watson-developer-cloud/node-sdk@v4.3.2...v4.3.3) (2019-08-08)

### Bug Fixes

* send correct user-agent header for websocket methods ([watson-developer-cloud#930](watson-developer-cloud#930)) ([f24cac2](watson-developer-cloud@f24cac2))