SemVer

• semver_OP(+a, +b): compare semver versions, resolves if a OP b is true. Valid OPs are the same as those for number_OP, except there is no semver_eq.

• semver_exact(+a, +b):  =I.J.K means exactly the version I.J.K; =I.J means equivalent to >=I.J.0, <I.(J+1).0; =I means equivalent to >=I.0.0, <(I+1).0.0.