fix(common): make ExtraModuleDefinitionOptions partial in OPTIONS_TYPE

[twchn]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

What is the current behavior?

the OPTIONS_TYPE and ASYNC_OPTIONS_TYPE require all fields of ExtraModuleDefinitionOptions, but ExtraModuleDefinitionOptions has default values which are set in the setExtras function.

What is the new behavior?

the ExtraModuleDefinitionOptions in OPTIONS_TYPE and ASYNC_OPTIONS_TYPE is partial.

Does this PR introduce a breaking change?

• Yes
• No

[coveralls]

Pull Request Test Coverage Report for Build 958b8a19-608a-4063-8148-72fa1b21c0b9

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 93.817%

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Totals
Change from base Build 33d64ea6-8564-4074-89ae-b787d2d45c2d:	0.0%
Covered Lines:	6100
Relevant Lines:	6502

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💛 - Coveralls

[kamilmysliwiec]

lgtm