* Add `subset(r1, r2)` method to determine if `r1` range is entirely contained by `r2` range.
7.2.3
* Fix handling of `includePrelease` mode where version ranges like `1.0.0 - 2.0.0` would include `3.0.0-pre` and not `1.0.0-pre`.
7.2.2
* Fix bug where `2.0.0-pre` would be included in `^1.0.0` if `includePrerelease` was set to true.
7.2.0
* Add `simplifyRange` method to attempt to generate a more human-readable range expression that is equivalent to a supplied range, for a given set of versions.
7.1.2
* Remove fancy lazy-loading logic, as it was causing problems for webpack users.
7.1.0
* Add `require('semver/preload')` to load the entire module without using lazy getter methods.