fix(core): add missing semver dependency

[dyladan]

Which problem is this PR solving?

#471

Short description of the changes

• add missing semver dependency

[codecov-io]

Codecov Report

Merging #472 into master will decrease coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #472      +/-   ##
==========================================
- Coverage   94.93%   94.88%   -0.05%     
==========================================
  Files         131      131              
  Lines        6635     6554      -81     
  Branches      565      561       -4     
==========================================
- Hits         6299     6219      -80     
+ Misses        336      335       -1

Impacted Files	Coverage Δ
...ges/opentelemetry-exporter-zipkin/src/transform.ts	100% <0%> (ø)	⬆️
...entelemetry-exporter-jaeger/test/transform.test.ts	100% <0%> (ø)	⬆️
.../opentelemetry-exporter-zipkin/test/zipkin.test.ts	100% <0%> (ø)	⬆️
.../opentelemetry-plugin-dns/test/utils/assertSpan.ts	100% <0%> (ø)	⬆️
...pe-async-hooks/test/AsyncHooksScopeManager.test.ts	100% <0%> (ø)	⬆️
.../opentelemetry-exporter-jaeger/test/jaeger.test.ts	100% <0%> (ø)	⬆️
...try-plugin-dns/test/functionals/dns-enable.test.ts	100% <0%> (ø)	⬆️
...entelemetry-exporter-zipkin/test/transform.test.ts	100% <0%> (ø)	⬆️
...kages/opentelemetry-plugin-dns/test/utils/utils.ts	60% <0%> (+2.85%)	⬆️