Update dependency @types/semver to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
@​types/semver	devDependencies	major	^5.5.0 -> ^6.0.0	source

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[codecov-io]

Codecov Report

Merging #461 into master will decrease coverage by 0.41%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #461      +/-   ##
==========================================
- Coverage    94.7%   94.28%   -0.42%     
==========================================
  Files         150      150              
  Lines        9785     8787     -998     
  Branches      738      723      -15     
==========================================
- Hits         9267     8285     -982     
+ Misses        518      502      -16

Impacted Files	Coverage Δ
src/common/noop-logger.ts	0% <0%> (-16.67%)	⬇️
src/internal/string-utils.ts	100% <0%> (ø)	⬆️
src/index.ts	100% <0%> (ø)	⬆️
src/http-stats.ts	100% <0%> (ø)	⬆️
test/test-tag-map.ts	100% <0%> (ø)	⬆️
test/test-no-record-span.ts	100% <0%> (ø)	⬆️
test/test-metric-producer-manager.ts	100% <0%> (ø)	⬆️
test/test-exporter-buffer.ts	100% <0%> (ø)	⬆️
test/test-utils.ts	100% <0%> (ø)	⬆️
test/test-validation.ts	100% <0%> (ø)	⬆️
... and 27 more

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