(neptune-alpha): support for engine version v1.3

[badmintoncryer]

Describe the feature

Neptune has released engine v1.3. We would like to make CDK compatible with this version as well.
https://docs.aws.amazon.com/neptune/latest/userguide/engine-releases.html

Use Case

Creating v1.3 engine Cluster

Proposed Solution

Update EngineVersion and ParameterGroupFamily enums.

A detailed description of v1.3 follows.
engineVersion: https://docs.aws.amazon.com/neptune/latest/userguide/engine-releases-1.3.0.0.html
parameterGroupFamily: https://docs.aws.amazon.com/neptune/latest/userguide/parameter-groups.html

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

CDK version used

2.116.1

Environment details (OS name and version, etc.)

irrelevant

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