Release v2.3.1 (googleapis#324)

Release v2.3.0 (googleapis#290)

Release v2.2.0 (googleapis#277)

Release v2.1.2 (googleapis#271)

Release v2.1.1 (googleapis#195)

Release v2.1.0 (googleapis#165)

fix: npm link ../ before npm install in samples (googleapis#115)

bump version to 1.5.0 (googleapis#67)

release 1.4.0

release 1.3.0 (googleapis#49)

* release 1.3.0

## Features

In this minor release we updated some protos used by `v1p1beta1` endpoint (added optional `metadata` field to `RecognitionConfig` message). There is no need to change any existing code. Also, `v1` endpoint is still default. If you want to try using the new `v1p1beta1` endpoint, you need to request it in your code:
```js
const speech = require('@google-cloud/nodejs-speech).v1p1beta1;
```

* updating dependency in samples/package.json

* locks. again.