chore(deps): update dependency google-cloud-speech to v1.3.2 [(#3167)](…

…GoogleCloudPlatform/python-docs-samples#3167)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [google-cloud-speech](https://togithub.com/googleapis/python-speech) | patch | `==1.3.1` -> `==1.3.2` |

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### Release Notes

<details>
<summary>googleapis/python-speech</summary>

### [`v1.3.2`](https://togithub.com/googleapis/python-speech/blob/master/CHANGELOG.md#&#8203;132httpswwwgithubcomgoogleapispython-speechcomparev131v132-2020-02-03)

[Compare Source](https://togithub.com/googleapis/python-speech/compare/v1.3.1...v1.3.2)

</details>

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packages/google-cloud-python-speech/samples/microphone/requirements.txt

@@ -1,4 +1,4 @@
-google-cloud-speech==1.3.1
+google-cloud-speech==1.3.2
 pyaudio==0.2.11
 six==1.13.0