vue-template-compiler module types do not express the correct optional properties

[emensch]

Version

2.6.10

Reproduction link

https://codesandbox.io/s/vue-template-compiler-module-type-bug-wl0wn

Steps to reproduce

Issue is surfaced by CodeSandbox' typescript linter - just load the sandbox.

What is expected?

vue-template-compiler should accept modules with 0 or more of the following properties:

• preTransformNode
• transformNode
• postTransformNode
• genData

What is actually happening?

vue-template-compiler requires modules to have all transform functions and genData defined.

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Ran into this while developing a custom template compiler module. It doesn't effect output or compiler functionality in any way, but it does impact developer experience.

Fixed by #10743