feat(microservices): add serializer and deserializer, improve performance

[kamilmysliwiec]

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: N/A

What is the new behavior?

• schedule messages on nextTick to reduce network traffic (better performance)
• add serializer & deserializer feature to every transport strategy (allow to adapt external services with schema expected by NestJS)

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[coveralls]

Pull Request Test Coverage Report for Build 3878

• 126 of 137 (91.97%) changed or added relevant lines in 17 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.2%) to 95.073%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
packages/microservices/server/server.ts	16	17	94.12%
packages/microservices/client/client-proxy.ts	5	7	71.43%
packages/microservices/deserializers/incoming-response.deserializer.ts	6	9	66.67%
packages/microservices/deserializers/incoming-request.deserializer.ts	6	11	54.55%

Totals
Change from base Build 3842:	-0.2%
Covered Lines:	3724
Relevant Lines:	3917

---

💛 - Coveralls

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.