Bump pub_semver from 2.1.3 to 2.1.4

Bumps [pub_semver](https://github.com/dart-lang/pub_semver) from 2.1.3 to 2.1.4.
- [Release notes](https://github.com/dart-lang/pub_semver/releases)
- [Changelog](https://github.com/dart-lang/pub_semver/blob/master/CHANGELOG.md)
- [Commits](dart-lang/pub_semver@2.1.3...v2.1.4)

---
updated-dependencies:
- dependency-name: pub_semver
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

pubspec.lock

@@ -333,10 +333,10 @@ packages:
     dependency: "direct dev"
     description:
       name: pub_semver
-      sha256: "307de764d305289ff24ad257ad5c5793ce56d04947599ad68b3baa124105fc17"
+      sha256: "40d3ab1bbd474c4c2328c91e3a7df8c6dd629b79ece4c4bd04bee496a224fb0c"
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.3"
+    version: "2.1.4"
   pubspec_parse:
     dependency: "direct dev"
     description: