Update gem dependencies

Gemfile.lock

@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (4.2.5)
+    activesupport (4.2.5.1)
       i18n (~> 0.7)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
@@ -21,22 +21,22 @@ GEM
     concurrent-ruby (1.0.0)
     daemons (1.2.3)
     erubis (2.7.0)
-    ethon (0.8.0)
+    ethon (0.8.1)
       ffi (>= 1.3.0)
-    eventmachine (1.0.8)
+    eventmachine (1.0.9.1)
     execjs (2.6.0)
     ffi (1.9.10)
     highline (1.7.8)
-    html-pipeline (2.2.2)
+    html-pipeline (2.3.0)
       activesupport (>= 2, < 5)
       nokogiri (>= 1.4)
     i18n (0.7.0)
     json (1.8.3)
     method_source (0.8.2)
     mini_portile2 (2.0.0)
-    minitest (5.8.3)
+    minitest (5.8.4)
     multi_json (1.11.2)
-    nokogiri (1.6.7.1)
+    nokogiri (1.6.7.2)
       mini_portile2 (~> 2.0.0.rc2)
     options (2.3.2)
     progress_bar (1.0.5)
@@ -51,11 +51,11 @@ GEM
       rack
     rack-test (0.6.3)
       rack (>= 1.0)
-    rake (10.4.2)
+    rake (10.5.0)
     rr (1.1.2)
-    sass (3.4.20)
-    sinatra (1.4.6)
-      rack (~> 1.4)
+    sass (3.4.21)
+    sinatra (1.4.7)
+      rack (~> 1.5)
       rack-protection (~> 1.4)
       tilt (>= 1.3, < 3)
     sinatra-contrib (1.4.6)
@@ -84,7 +84,7 @@ GEM
       verse (~> 0.4.0)
     tty-screen (0.4.3)
     tty-which (0.1.0)
-    typhoeus (0.8.0)
+    typhoeus (1.0.1)
       ethon (>= 0.8.0)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)