fix: enforce strict equality on prerelease versions

[dyladan]

This PR prevents the API from accidentally accepting compatibility from e.g. 1.0.0 and 1.0.0-rc.3.

It is a requirement if we want the possibility of ever using canary releases.

[codecov]

Codecov Report

Merging #94 (ac61ee8) into main (fda0e6b) will increase coverage by 0.04%.
The diff coverage is 100.00%.

❗ Current head ac61ee8 differs from pull request most recent head 973c0ab. Consider uploading reports for the commit 973c0ab to get more accurate results

@@            Coverage Diff             @@
##             main      #94      +/-   ##
==========================================
+ Coverage   94.84%   94.89%   +0.04%     
==========================================
  Files          42       42              
  Lines         563      568       +5     
  Branches       87       89       +2     
==========================================
+ Hits          534      539       +5     
  Misses         29       29              

Impacted Files	Coverage Δ
src/internal/semver.ts	100.00% <100.00%> (ø)

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