Bump semver from 6.1.0 to 6.1.1 in /terminus-plugin-manager

Bumps [semver](https://github.com/npm/node-semver) from 6.1.0 to 6.1.1.
- [Release notes](https://github.com/npm/node-semver/releases)
- [Changelog](https://github.com/npm/node-semver/blob/master/CHANGELOG.md)
- [Commits](https://github.com/npm/node-semver/compare/v6.1.0...v6.1.1)

terminus-plugin-manager/yarn.lock

@@ -3172,9 +3172,9 @@ semver-diff@^2.0.0:
   integrity sha512-RS9R6R35NYgQn++fkDWaOmqGoj4Ek9gGs+DPxNUZKuwE183xjJroKvyo1IzVFeXvUrvmALy6FWD5xrdJT25gMg==
 
 semver@^6.1.0:
-  version "6.1.0"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-6.1.0.tgz#e95dc415d45ecf03f2f9f83b264a6b11f49c0cca"
-  integrity sha512-kCqEOOHoBcFs/2Ccuk4Xarm/KiWRSLEX9CAZF8xkJ6ZPlIoTZ8V5f7J16vYLJqDbR7KrxTJpR2lqjIEm2Qx9cQ==
+  version "6.1.1"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-6.1.1.tgz#53f53da9b30b2103cd4f15eab3a18ecbcb210c9b"
+  integrity sha512-rWYq2e5iYW+fFe/oPPtYJxYgjBm8sC4rmoGdUOgBB7VnwKt6HrL793l2voH1UlsyYZpJ4g0wfjnTEO1s1NP2eQ==
 
 semver@~5.3.0:
   version "5.3.0"