chore(deps): update dependency google-cloud-media-translation to v0.4…

….0 (GoogleCloudPlatform#74)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [google-cloud-media-translation](https://togithub.com/googleapis/python-media-translation) | `==0.2.0` -> `==0.4.0` | [![age](https://badges.renovateapi.com/packages/pypi/google-cloud-media-translation/0.4.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-cloud-media-translation/0.4.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-cloud-media-translation/0.4.0/compatibility-slim/0.2.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-cloud-media-translation/0.4.0/confidence-slim/0.2.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/python-media-translation</summary>

### [`v0.4.0`](https://togithub.com/googleapis/python-media-translation/blob/master/CHANGELOG.md#&#8203;040-httpswwwgithubcomgoogleapispython-media-translationcomparev030v040-2021-05-27)

[Compare Source](https://togithub.com/googleapis/python-media-translation/compare/v0.3.0...v0.4.0)

##### Features

-   support self-signed JWT flow for service accounts ([b610e3d](https://www.github.com/googleapis/python-media-translation/commit/b610e3d81f7f65b00cad3da5cccdc8038b7122d4))

##### Bug Fixes

-   add async client to %name\_%version/init.py ([b610e3d](https://www.github.com/googleapis/python-media-translation/commit/b610e3d81f7f65b00cad3da5cccdc8038b7122d4))
-   Remove unsupported fields: recognition_result and alternative_source_language_codes ([#&GoogleCloudPlatform#8203;61](https://www.github.com/googleapis/python-media-translation/issues/61)) ([b610e3d](https://www.github.com/googleapis/python-media-translation/commit/b610e3d81f7f65b00cad3da5cccdc8038b7122d4))

##### Documentation

-   Add more comments for supported audio type. ([b610e3d](https://www.github.com/googleapis/python-media-translation/commit/b610e3d81f7f65b00cad3da5cccdc8038b7122d4))

### [`v0.3.0`](https://togithub.com/googleapis/python-media-translation/blob/master/CHANGELOG.md#&#8203;030-httpswwwgithubcomgoogleapispython-media-translationcomparev020v030-2021-02-11)

[Compare Source](https://togithub.com/googleapis/python-media-translation/compare/v0.2.0...v0.3.0)

##### Features

-   add async client; add common resource path helper methods ([#&GoogleCloudPlatform#8203;21](https://www.github.com/googleapis/python-media-translation/issues/21)) ([cb77463](https://www.github.com/googleapis/python-media-translation/commit/cb77463b297c2fcf194b714281ed82450b1594d3))

##### Documentation

-   fix product documentation url ([#&GoogleCloudPlatform#8203;19](https://www.github.com/googleapis/python-media-translation/issues/19)) ([0aae986](https://www.github.com/googleapis/python-media-translation/commit/0aae986b41e8326995f51d3e1f129f28c524b151))

</details>

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media-translation/snippets/requirements.txt

@@ -1,3 +1,3 @@
-google-cloud-media-translation==0.2.0
+google-cloud-media-translation==0.4.0
 pyaudio==0.2.11
 six==1.16.0