Google.Cloud.Functions.Testing version 1.0.0-beta05

Release Functions Framework .NET packages version 1.0.0-beta05

Changes since 1.0.0-beta04:

- Update to release candidate of CloudNative.CloudEvents package,
  which removes the need for a Google.Events package at all
- Minor changes to conversions to CloudEvents (with a few more coming)
- Dispose of the host instead of the TestServer in FunctionTestServer (fixes #182)
- Templates now include `appsettings*.json` for deployment (fixes #192 and #201)
- Add support for scopes (fixes #193)

Packages in this release:
- Release Google.Cloud.Functions.Framework version 1.0.0-beta05
- Release Google.Cloud.Functions.Hosting version 1.0.0-beta05
- Release Google.Cloud.Functions.Templates version 1.0.0-beta05
- Release Google.Cloud.Functions.Testing version 1.0.0-beta05