fix: do not stringify headers for logging

[achingbrain]

The frame headers are passed through the stringifyHeader for trace logging if a logger exists. Unfortunately a logger is set by default so this always occurs.

If we need to log these things as a string, checking that the logger is enabled is one option:

if (this.log.enabled) {
  // do expensive logging operation
}

Another is adding a custom formatter to the log class, or just having the header object appear in the console.

[codecov-commenter]

Codecov Report

Attention: 29 lines in your changes are missing coverage. Please review.

Files	Coverage Δ
src/encode.ts	100.00% <100.00%> (ø)
test/codec.spec.ts	100.00% <100.00%> (ø)
test/compliance.spec.ts	100.00% <100.00%> (ø)
test/decode.spec.ts	96.01% <100.00%> (-0.02%)	:arrow_down:
test/muxer.spec.ts	100.00% <100.00%> (ø)
test/stream.spec.ts	100.00% <100.00%> (+0.90%)	:arrow_up:
test/util.ts	100.00% <100.00%> (ø)
src/decode.ts	93.75% <88.88%> (-1.39%)	:arrow_down:
src/stream.ts	98.01% <99.08%> (+2.52%)	:arrow_up:
test/codec.util.ts	94.28% <66.66%> (ø)
... and 2 more

:loudspeaker: Thoughts on this report? Let us know!

[github-actions[bot]]

:tada: This PR is included in version 5.0.1 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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