chore(deps): update dependency google-cloud-bigquery to v1.28.0 (#94)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [google-cloud-bigquery](https://togithub.com/googleapis/python-bigquery) | minor | `==1.27.2` -> `==1.28.0` |

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### Release Notes

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

### [`v1.28.0`](https://togithub.com/googleapis/python-bigquery/blob/master/CHANGELOG.md#&#8203;1280-httpswwwgithubcomgoogleapispython-bigquerycomparev1272v1280-2020-09-22)

[Compare Source](https://togithub.com/googleapis/python-bigquery/compare/v1.27.2...v1.28.0)

##### Features

-   add custom cell magic parser to handle complex `--params` values ([#&#8203;213](https://www.github.com/googleapis/python-bigquery/issues/213)) ([dcfbac2](https://www.github.com/googleapis/python-bigquery/commit/dcfbac267fbf66d189b0cc7e76f4712122a74b7b))
-   add instrumentation to list methods ([#&#8203;239](https://www.github.com/googleapis/python-bigquery/issues/239)) ([fa9f9ca](https://www.github.com/googleapis/python-bigquery/commit/fa9f9ca491c3f9954287102c567ec483aa6151d4))
-   add opentelemetry tracing ([#&#8203;215](https://www.github.com/googleapis/python-bigquery/issues/215)) ([a04996c](https://www.github.com/googleapis/python-bigquery/commit/a04996c537e9d8847411fcbb1b05da5f175b339e))
-   expose require_partition_filter for hive_partition ([#&#8203;257](https://www.github.com/googleapis/python-bigquery/issues/257)) ([aa1613c](https://www.github.com/googleapis/python-bigquery/commit/aa1613c1bf48c7efb999cb8b8c422c80baf1950b))

##### Bug Fixes

-   fix dependency issue in fastavro ([#&#8203;241](https://www.github.com/googleapis/python-bigquery/issues/241)) ([2874abf](https://www.github.com/googleapis/python-bigquery/commit/2874abf4827f1ea529519d4b138511d31f732a50))
-   update minimum dependency versions ([#&#8203;263](https://www.github.com/googleapis/python-bigquery/issues/263)) ([1be66ce](https://www.github.com/googleapis/python-bigquery/commit/1be66ce94a32b1f924bdda05d068c2977631af9e))
-   validate job_config.source_format in load_table_from_dataframe ([#&#8203;262](https://www.github.com/googleapis/python-bigquery/issues/262)) ([6160fee](https://www.github.com/googleapis/python-bigquery/commit/6160fee4b1a79b0ea9031cc18caf6322fe4c4084))

##### Documentation

-   recommend insert_rows_json to avoid call to tables.get ([#&#8203;258](https://www.github.com/googleapis/python-bigquery/issues/258)) ([ae647eb](https://www.github.com/googleapis/python-bigquery/commit/ae647ebd68deff6e30ca2cffb5b7422c6de4940b))

##### [1.27.2](https://www.github.com/googleapis/python-bigquery/compare/v1.27.1...v1.27.2) (2020-08-18)

##### Bug Fixes

-   rationalize platform constraints for 'pyarrow' extra ([#&#8203;235](https://www.github.com/googleapis/python-bigquery/issues/235)) ([c9a0567](https://www.github.com/googleapis/python-bigquery/commit/c9a0567f59491b769a9e2fd535430423e39d4fa8))

##### [1.27.1](https://www.github.com/googleapis/python-bigquery/compare/v1.27.0...v1.27.1) (2020-08-18)

##### Bug Fixes

-   tweak pyarrow extra to soothe PyPI ([#&#8203;230](https://www.github.com/googleapis/python-bigquery/issues/230)) ([c15efbd](https://www.github.com/googleapis/python-bigquery/commit/c15efbd1ee4488898fc862768eef701443f492f6))

</details>

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asset/snippets/snippets/requirements.txt

@@ -2,4 +2,4 @@ google-cloud-storage==1.31.0
 google-cloud-asset==2.0.0
 google-cloud-resource-manager==0.30.2
 google-cloud-pubsub==1.7.0
-google-cloud-bigquery==1.27.2
+google-cloud-bigquery==1.28.0