fix: Updates to gem metadata

.yardopts

@@ -0,0 +1,11 @@
+--no-private
+--title=Google Auth
+--markup markdown
+--markup-provider redcarpet
+
+./lib/**/*.rb
+-
+README.md
+CHANGELOG.md
+CODE_OF_CONDUCT.md
+LICENSE

googleauth.gemspec

@@ -5,35 +5,38 @@ $LOAD_PATH.push File.expand_path("lib", __dir__)
 require "googleauth/version"
 
 Gem::Specification.new do |gem|
-  gem.name          = "googleauth"
-  gem.version       = Google::Auth::VERSION
-  gem.authors       = ["Tim Emiola"]
-  gem.email         = "temiola@google.com"
-  gem.homepage      = "https://github.com/googleapis/google-auth-library-ruby"
-  gem.summary       = "Google Auth Library for Ruby"
-  gem.license       = "Apache-2.0"
-  gem.description   = <<-DESCRIPTION
-   Allows simple authorization for accessing Google APIs.
-   Provide support for Application Default Credentials, as described at
-   https://developers.google.com/accounts/docs/application-default-credentials
-  DESCRIPTION
-
-  gem.files         = `git ls-files`.split "\n"
-  gem.test_files    = `git ls-files -- spec/*`.split "\n"
-  gem.executables   = `git ls-files -- bin/*.rb`.split("\n").map do |f|
-    File.basename f
-  end
+  gem.name = "googleauth"
+  gem.version = Google::Auth::VERSION
+
+  gem.authors = ["Tim Emiola"]
+  gem.email = ["temiola@google.com"]
+  gem.summary = "Google Auth Library for Ruby"
+  gem.description = "Implements simple authorization for accessing Google APIs, and provides support for " \
+                      "Application Default Credentials."
+  gem.homepage = "https://github.com/googleapis/google-auth-library-ruby"
+  gem.license = "Apache-2.0"
+
+  gem.files = Dir.glob("lib/**/*.rb") + Dir.glob("*.md") + ["LICENSE", ".yardopts"]
   gem.require_paths = ["lib"]
 
-  gem.platform      = Gem::Platform::RUBY
+  gem.platform = Gem::Platform::RUBY
   gem.required_ruby_version = ">= 2.5"
 
   gem.add_dependency "faraday", ">= 0.17.3", "< 2.0"
   gem.add_dependency "jwt", ">= 1.4", "< 3.0"
   gem.add_dependency "memoist", "~> 0.16"
   gem.add_dependency "multi_json", "~> 1.11"
   gem.add_dependency "os", ">= 0.9", "< 2.0"
-  gem.add_dependency "signet", "~> 0.14"
+  gem.add_dependency "signet", "~> 0.15"
 
+  gem.add_development_dependency "google-style", "~> 1.25.1"
+  gem.add_development_dependency "redcarpet", "~> 3.0"
+  gem.add_development_dependency "rspec", "~> 3.1"
   gem.add_development_dependency "yard", "~> 0.9"
+
+  if gem.respond_to? :metadata
+    gem.metadata["changelog_uri"] = "https://github.com/googleapis/google-auth-library-ruby/blob/master/CHANGELOG.md"
+    gem.metadata["source_code_uri"] = "https://github.com/googleapis/google-auth-library-ruby"
+    gem.metadata["bug_tracker_uri"] = "https://github.com/googleapis/google-auth-library-ruby/issues"
+  end
 end