GH-111 Tested the requiring of a CSS class name

Author: keithmifsud

Gemfile

@@ -1,5 +1,5 @@
 source "https://rubygems.org"
 
 gem 'jekyll', '~> 3.7.0'
-gem 'jekyll-target-blank', '1.0'
+gem 'jekyll-target-blank', '1.1.0.beta'
 gem 'jekyll-sitemap', '1.2.0'

Gemfile.lock

@@ -33,7 +33,7 @@ GEM
       sass (~> 3.4)
     jekyll-sitemap (1.2.0)
       jekyll (~> 3.3)
-    jekyll-target-blank (1.0)
+    jekyll-target-blank (1.1.0.beta)
       jekyll (~> 3.0)
       nokogiri (~> 1.8.2)
     jekyll-watch (2.0.0)
@@ -46,9 +46,9 @@ GEM
       ruby_dep (~> 1.2)
     mercenary (0.3.6)
     mini_portile2 (2.3.0)
-    nokogiri (1.8.2)
+    nokogiri (1.8.4)
       mini_portile2 (~> 2.3.0)
-    nokogiri (1.8.2-x64-mingw32)
+    nokogiri (1.8.4-x64-mingw32)
       mini_portile2 (~> 2.3.0)
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
@@ -72,7 +72,7 @@ PLATFORMS
 DEPENDENCIES
   jekyll (~> 3.7.0)
   jekyll-sitemap (= 1.2.0)
-  jekyll-target-blank (= 1.0)
+  jekyll-target-blank (= 1.1.0.beta)
 
 BUNDLED WITH
-   1.16.2
+   1.16.3

_config.yml

@@ -27,11 +27,14 @@ collections:
     output: true
     permalink: /newsletter/:path
 defaults:
-  - scope: 
+  - scope:
       path: ""
       type: "newsletter"
     values:
       layout: "newsletter"
 plugins:
   - jekyll-target-blank
   - jekyll-sitemap
+
+target-blank:
+  css_class: ext-link

_includes/footer/index.html

@@ -29,7 +29,7 @@ <h2 class="ttu f6">Company</h2>
     <div class="pt3 pt0-ns">
       <h2 class="ttu f6">Follow us</h2>
       <ul class="list pl0">
-        <li class="dib"><a href="https://github.com/learnk8s" class="link dib w2 icon">{% include footer/github.svg %}</a></li>
+        <li class="dib"><a href="https://github.com/learnk8s" class="link dib w2 icon ext-link">{% include footer/github.svg %}</a></li>
         <li class="dib"><a href="https://twitter.com/learnk8s" class="link dib w2 icon">{% include footer/twitter.svg %}</a></li>
         <li class="dib"><a href="skype:daniele.polencic?chat" class="link dib w2 icon">{% include footer/skype.svg %}</a></li>
         <li class="dib"><a href="https://www.linkedin.com/company/learnk8s/" class="link dib w2 icon">{% include footer/linkedin.svg %}</a></li>