Allow to set author url

lib/jekyll-seo-tag/json_ld_drop.rb

@@ -41,10 +41,15 @@ module Jekyll
         author_type = page_drop.author["type"]
         return if author_type && !VALID_AUTHOR_TYPES.include?(author_type)
 
-        {
+        hash = {
           "@type" => author_type || "Person",
           "name"  => page_drop.author["name"],
         }
+
+        author_url = page_drop.author["url"]
+        hash["url"] = author_url if author_url
+
+        hash
       end
 
       def image

spec/jekyll_seo_tag/json_ld_drop_spec.rb

@@ -95,6 +95,20 @@ RSpec.describe Jekyll::SeoTag::JSONLDDrop do
         expect(subject["author"]).to be nil
       end
     end
+
+    context "when url is present" do
+      let(:author) { { "name" => "author", "url" => "https://example.com" } }
+
+      it "returns the author with url" do
+        expect(subject).to have_key("author")
+        expect(subject["author"]).to be_a(Hash)
+        expect(subject["author"]).to have_key("url")
+        expect(subject["author"]["url"]).to eql("https://example.com")
+        expect(subject["author"]).to have_key("name")
+        expect(subject["author"]["name"]).to be_a(String)
+        expect(subject["author"]["name"]).to eql("author")
+      end
+    end
   end
 
   context "image" do