Bump Amazon.Lambda.RuntimeSupport from 1.5.0 to 1.6.0
Bump Amazon.Lambda.RuntimeSupport from 1.5.0 to 1.6.0

Bumps [Amazon.Lambda.RuntimeSupport](https://github.com/aws/aws-lambda-dotnet) from 1.5.0 to 1.6.0.
- [Release notes](https://github.com/aws/aws-lambda-dotnet/releases)
- [Changelog](https://github.com/aws/aws-lambda-dotnet/blob/master/RELEASE.CHANGELOG.md)
- [Commits](https://github.com/aws/aws-lambda-dotnet/commits)

---
updated-dependencies:
- dependency-name: Amazon.Lambda.RuntimeSupport
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
martincostello/alexa-london-travel