pubspec: remove author, update homepage URL

pkgs/pub_semver/pubspec.yaml

diff --git a/pkgs/pub_semver/pubspec.yaml b/pkgs/pub_semver/pubspec.yaml
index b92d2f6..1297883 100644
--- a/pkgs/pub_semver/pubspec.yaml
+++ b/pkgs/pub_semver/pubspec.yaml
@@ -4,8 +4,7 @@
 description: >-
  Versions and version constraints implementing pub's versioning policy. This
  is very similar to vanilla semver, with a few corner cases.
-author: Dart Team <misc@dartlang.org>
-homepage: http://github.com/dart-lang/pub_semver
+homepage: https://github.com/dart-lang/pub_semver
 
 environment:
  sdk: '>=2.0.0 <3.0.0'