Update dependency semver to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
semver	dependencies	major	^5.7.0 -> ^6.0.0	source

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Release Notes

npm/node-semver

v6.0.0

Compare Source

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[codecov]

Codecov Report

Merging #36 into develop will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           develop    #36   +/-   ##
======================================
  Coverage      100%   100%           
======================================
  Files            1      1           
  Lines           52     52           
  Branches         7      7           
======================================
  Hits            52     52

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