Octue

Summary
Update `numpy` in the developer dependencies and template apps to avoid a buffer overflow vulnerability.

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Contents ([299](https://github.com/octue/octue-sdk-python/pull/299))

Dependencies
- Increase `numpy` version in developer dependencies and template apps from `1.19.2` to `1.21.0`

Testing
- Decouple monitors tests from cloud storage availability

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Contents ([342](https://github.com/octue/octue-sdk-python/pull/342))

Enhancements
- Add `allow_local_files` parameter to `Child.ask`

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Summary
Upgrade to `apache-beam==2.36.0`, allowing:
- The previous temporary downgrade of `google-cloud-pubsub` by a major version to be reverted
- `numpy>=1.21.0` to be used with apps deployed to Google Dataflow

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Contents ([337](https://github.com/octue/octue-sdk-python/pull/337))

Fixes
- Avoid CLI failure if octue not installed with `dataflow` option

Dependencies
- Use `apache-beam==2.36.0`
- Use `google-cloud-pubsub>=2.5.0,<3`

Reversions
- Revert temporary downgrade of `google-cloud-pubsub` to `1.7.0`

Style
- Add missing comma to pydocstyle configuration

Testing
- Increase answer timeouts in child services template app to ensure test doesn't fail due to increased answer latency
- Update `gcp-storage-emulator` to latest version

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Contents ([335](https://github.com/octue/octue-sdk-python/pull/335))

Fixes
- Forward error/exception log messages to parent successfully

Refactoring
- Factor out exception serialisation into a function

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Contents ([332](https://github.com/octue/octue-sdk-python/pull/332))
**IMPORTANT:** There is 1 breaking change.

Dependencies
- **BREAKING CHANGE:** Make apache-beam an optional dependency under the "dataflow" key

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Contents ([330](https://github.com/octue/octue-sdk-python/pull/330))

Fixes
- Disable Dataflow Prime if machine type provided for job

Testing
- Test generating Cloud Build config with build secrets

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