feat(microservices): add subscribe and from beginning to kafka options

[theabuitendyk]

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
[x] 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?

Issue Number: #3739

What is the new behavior?

KafkaOptions includes support for the kafka.js subscribe fromBeginning option.

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[coveralls]

Pull Request Test Coverage Report for Build 15907

• 2 of 2 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.002%) to 95.065%

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Totals
Change from base Build 15874:	0.002%
Covered Lines:	4565
Relevant Lines:	4802

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💛 - Coveralls

[theabuitendyk]

@kamilmysliwiec What's the typical timeline for releasing a change like this to master if it's approved? Our team has a project that is blocked without the fromBeginning option, so we're prepared to fork nestjs in the meantime if it's a ways out but would prefer not to.

Thank you for nestjs. 🙂I've really enjoyed working with the framework so far!

[kamilmysliwiec]

Thanks!