Update Angular documentation (5.1.3)

assets/javascripts/templates/pages/about_tmpl.coffee

@@ -87,7 +87,7 @@ app.templates.aboutPage = -> """
 
 credits = [
   [ 'Angular<br>Angular.js',
-    '2010-2017 Google, Inc.',
+    '2010-2018 Google, Inc.',
     'CC BY',
     'https://creativecommons.org/licenses/by/4.0/'
   ], [

lib/docs/scrapers/angular.rb

@@ -11,7 +11,7 @@ module Docs
     options[:max_image_size] = 256_000
 
     options[:attribution] = <<-HTML
-      &copy; 2010&ndash;2017 Google, Inc.<br>
+      &copy; 2010&ndash;2018 Google, Inc.<br>
       Licensed under the Creative Commons Attribution License 4.0.
     HTML
 
@@ -59,7 +59,7 @@ module Docs
     end
 
     version do
-      self.release = '5.0.1'
+      self.release = '5.1.3'
       self.base_url = 'https://angular.io/'
       self.root_path = 'docs'