Bump github.com/Masterminds/semver

CHANGELOG.md

@@ -14,6 +14,7 @@ IMPROVEMENTS:
 ([#1549](https://github.com/golang/dep/pull/1549)).
 * Reduce network access by trusting local source information and only pulling
 from upstream when necessary ([#1250](https://github.com/golang/dep/pull/1250)).
+* Update our dependency on Masterminds/semver to follow upstream again now that [Masterminds/semver#67](https://github.com/Masterminds/semver/pull/67) is merged([#1792](https://github.com/golang/dep/pull/1792)).
 
 WIP:
 * Enable importing external configuration from dependencies during init (#1277). This

Gopkg.toml

@@ -1,8 +1,6 @@
-# https://github.com/Masterminds/semver/pull/60
 [[constraint]]
   name = "github.com/Masterminds/semver"
-  source = "https://github.com/carolynvs/semver.git"
-  branch = "parse-constraints-with-dash-in-pre"
+  branch = "2.x"
 
 [[constraint]]
   name = "github.com/Masterminds/vcs"