fix(plugin-http): adapt to current @types/node

[Flarna]

Which problem is this PR solving?

fixes #541

Short description of the changes

Adapt http/https plugin to @types/node 12.12.9

Refs: #545

[codecov-io]

Codecov Report

Merging #548 into master will decrease coverage by 2.84%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #548      +/-   ##
==========================================
- Coverage   92.98%   90.13%   -2.85%     
==========================================
  Files         147      142       -5     
  Lines        7694     7057     -637     
  Branches      654      641      -13     
==========================================
- Hits         7154     6361     -793     
- Misses        540      696     +156

Impacted Files	Coverage Δ
...opentelemetry-plugin-http/test/utils/assertSpan.ts	100% <ø> (ø)	⬆️
...pentelemetry-core/test/internal/validators.test.ts	50% <0%> (-50%)	⬇️
...elemetry-core/test/trace/spancontext-utils.test.ts	55.55% <0%> (-44.45%)	⬇️
...lemetry-core/test/trace/ProbabilitySampler.test.ts	56.52% <0%> (-43.48%)	⬇️
...s/opentelemetry-core/test/trace/NoopTracer.test.ts	60% <0%> (-40%)	⬇️
...s/opentelemetry-core/test/context/B3Format.test.ts	63.39% <0%> (-36.61%)	⬇️
...ges/opentelemetry-core/test/trace/NoopSpan.test.ts	63.63% <0%> (-36.37%)	⬇️
...s/opentelemetry-core/test/trace/tracestate.test.ts	65.06% <0%> (-34.94%)	⬇️
...ges/opentelemetry-tracing/src/NoopSpanProcessor.ts	66.66% <0%> (-33.34%)	⬇️
...ntelemetry-core/test/trace/NoRecordingSpan.test.ts	71.42% <0%> (-28.58%)	⬇️
... and 37 more

[obecny]

lgtm,
does it mean that this PR, can be closed then in favour of this ?

[Flarna]

yes, one is enough.

[mayurkale22]

Should we also upgrade @types/node to ^12.12.8?

[Flarna]

I can adapt the package.json files. Only http/https or all 24 packages?

[dyladan]

I can adapt the package.json files. Only http/https or all 24 packages?

I see no reason not to do all 24

[dyladan]

@Flarna are you going to update the other package.jsons?

[Flarna]

@dyladan Nope, I updated only http/https and only @types/node.

[mayurkale22]

@dyladan Nope, I updated only http/https and only @types/node.

Ok, I can handle that in next PR. Thanks @Flarna for the work.