feat(core): I/O event decoder/encoder

[JozefFlakus]

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
[ ] Documentation content changes
[ ] Other... Please describe:

What is the new behavior?

• build: updated tsconfig lib to ES2020
• @marblejs/core: new I/O event decoder (issue: [RFC] I/O event decoder #273)

Does this PR introduce a breaking change?

[ ] Yes
[x] No

[codecov]

Codecov Report

Merging #272 into master will decrease coverage by 0.29%.
The diff coverage is 84.93%.

@@            Coverage Diff             @@
##           master     #272      +/-   ##
==========================================
- Coverage   95.41%   95.11%   -0.30%     
==========================================
  Files         157      158       +1     
  Lines        2769     2806      +37     
  Branches      366      315      -51     
==========================================
+ Hits         2642     2669      +27     
- Misses        123      133      +10     
  Partials        4        4              

Impacted Files	Coverage Δ
...kages/core/src/http/server/http.server.listener.ts	78.26% <ø> (ø)
packages/core/src/logger/logger.interface.ts	100.00% <ø> (ø)
...rc/transport/strategies/amqp.strategy.interface.ts	81.81% <ø> (ø)
.../testing/src/testBed/http/http.testBed.response.ts	75.00% <40.00%> (-13.24%)	⬇️
packages/core/src/+internal/utils/any.util.ts	76.92% <71.42%> (-6.42%)	⬇️
...ore/src/http/response/http.responseBody.factory.ts	80.95% <73.33%> (-19.05%)	⬇️
...ckages/core/src/+internal/http/contentType.util.ts	100.00% <100.00%> (ø)
packages/core/src/+internal/utils/array.util.ts	100.00% <100.00%> (ø)
packages/core/src/error/error.model.ts	100.00% <100.00%> (ø)
packages/core/src/event/event.factory.ts	100.00% <100.00%> (ø)
... and 10 more

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[tstelzer]

Ok then, create can be as it is but anyway I would like to remove this unnecessary decoding underneath and replace it with simple encode

Yes, makes perfect sense.