Update gem dependencies

Gemfile.lock

@@ -20,28 +20,28 @@ GEM
     coffee-script-source (1.9.1.1)
     daemons (1.2.3)
     erubis (2.7.0)
-    ethon (0.7.4)
+    ethon (0.8.0)
       ffi (>= 1.3.0)
     eventmachine (1.0.8)
     execjs (2.6.0)
     ffi (1.9.10)
-    highline (1.6.21)
-    html-pipeline (1.11.0)
-      activesupport (>= 2)
-      nokogiri (~> 1.4)
+    highline (1.7.8)
+    html-pipeline (2.2.1)
+      activesupport (>= 2, < 5)
+      nokogiri (>= 1.4)
     i18n (0.7.0)
     json (1.8.3)
     method_source (0.8.2)
     mini_portile (0.6.2)
-    minitest (5.8.0)
+    minitest (5.8.1)
     multi_json (1.11.2)
     nokogiri (1.6.6.2)
       mini_portile (~> 0.6.0)
     options (2.3.2)
-    progress_bar (1.0.3)
-      highline (~> 1.6.1)
+    progress_bar (1.0.5)
+      highline (~> 1.6)
       options (~> 2.3.0)
-    pry (0.10.1)
+    pry (0.10.2)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
@@ -52,7 +52,7 @@ GEM
       rack (>= 1.0)
     rake (10.4.2)
     rr (1.1.2)
-    sass (3.4.18)
+    sass (3.4.19)
     sinatra (1.4.6)
       rack (~> 1.4)
       rack-protection (~> 1.4)
@@ -65,19 +65,19 @@ GEM
       sinatra (~> 1.4.0)
       tilt (>= 1.3, < 3)
     slop (3.6.0)
-    sprockets (3.3.3)
-      rack (~> 1.0)
+    sprockets (3.4.0)
+      rack (> 1, < 3)
     sprockets-helpers (1.2.1)
       sprockets (>= 2.2)
-    thin (1.6.3)
+    thin (1.6.4)
       daemons (~> 1.0, >= 1.0.9)
-      eventmachine (~> 1.0)
+      eventmachine (~> 1.0, >= 1.0.4)
       rack (~> 1.0)
     thor (0.19.1)
     thread_safe (0.3.5)
     tilt (2.0.1)
-    typhoeus (0.7.3)
-      ethon (>= 0.7.4)
+    typhoeus (0.8.0)
+      ethon (>= 0.8.0)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
     uglifier (2.7.2)