Support strict comparisons

[mattfarina]

PR #243 suggested the idea of a strict comparison (i.e. ==) that does direct string comparisons. Stricter comparisons are a good idea. This issue captures some notes and requirements (for myself for later).

1. If there is a == there should be a !== to complement it
2. There should be a way to do strict comparisons with build metadata taken into account and with it skipped
3. Consider comparisons to node-semver which does not expose it's == and === functionality in the Comparator but it exists for direct use (and has for over a decade).
4. If a full semver is NOT provided a loose (dirty) handling should be enabled so that users get what they expect. If it's not loose than a ==1 will NEVER match to anything because a version would be 1.0.0 and a strict string comparison between those would be different.