Exchanged therubyracer with mini_racer

Signed-off-by: Jim Martens <github@2martens.de>

Gemfile

@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 # gem 'github-pages', group: :jekyll_plugins
 gem 'activesupport'
-gem 'therubyracer'
+gem 'mini_racer'
 # gem 'github-pages-health-check'
 gem 'html-proofer', group: :development
 gem 'jekyll', '~> 3.8.4'

Gemfile.lock

@@ -169,7 +169,7 @@ GEM
       html-pipeline (~> 2.2)
       jekyll (~> 3.0)
     kramdown (1.17.0)
-    libv8 (3.16.14.19)
+    libv8 (6.7.288.46.1)
     liquid (4.0.1)
     liquid-tag-parser (1.9.0)
       extras (~> 0.3)
@@ -180,6 +180,8 @@ GEM
       ruby_dep (~> 1.2)
     mercenary (0.3.6)
     mini_portile2 (2.3.0)
+    mini_racer (0.2.4)
+      libv8 (>= 6.3)
     minima (2.5.0)
       jekyll (~> 3.5)
       jekyll-feed (~> 0.9)
@@ -203,7 +205,6 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
-    ref (2.0.0)
     rouge (3.3.0)
     rubocop (0.60.0)
       jaro_winkler (~> 1.5.1)
@@ -232,9 +233,6 @@ GEM
       rack (> 1, < 3)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
-    therubyracer (0.12.3)
-      libv8 (~> 3.16.14.15)
-      ref
     thread_safe (0.3.6)
     typhoeus (1.3.1)
       ethon (>= 0.9.0)
@@ -291,6 +289,7 @@ DEPENDENCIES
   liquid
   listen
   mercenary
+  mini_racer
   minima
   rack (~> 2.0.6)
   rouge
@@ -298,7 +297,6 @@ DEPENDENCIES
   rubyzip (~> 1.2.2)
   sprockets
   terminal-table
-  therubyracer
   uglifier
 
 BUNDLED WITH