Update gems

Update to latest gems.
Signed-off-by: Ben Kochie <superq@gmail.com>

Gemfile.lock

@@ -5,25 +5,25 @@ GEM
       public_suffix (>= 2.0.2, < 4.0)
     adsf (1.4.1)
       rack (>= 1.0.0, < 3.0.0)
-    builder (3.2.2)
+    builder (3.2.3)
     coderay (1.1.2)
     colored (1.2)
-    concurrent-ruby (1.0.5)
-    cri (2.10.1)
+    concurrent-ruby (1.1.4)
+    cri (2.15.2)
       colored (~> 1.2)
     ddmemoize (1.0.0)
       ddmetrics (~> 1.0)
       ref (~> 2.0)
     ddmetrics (1.0.1)
     ddplugin (1.0.2)
-    diff-lcs (1.2.5)
+    diff-lcs (1.3)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
     eventmachine (1.2.7)
     ffi (1.9.25)
     formatador (0.2.5)
-    guard (2.14.2)
+    guard (2.15.0)
       formatador (>= 0.2.4)
       listen (>= 2.7, < 4.0)
       lumberjack (>= 1.0.12, < 2.0)
@@ -38,71 +38,73 @@ GEM
       guard (~> 2.8)
       guard-compat (~> 1.0)
       multi_json (~> 1.8)
-    guard-nanoc (2.1.2)
+    guard-nanoc (2.1.4)
       guard (~> 2.8)
       guard-compat (~> 1.0)
       nanoc (>= 4.3.8, < 5.0)
     hamster (3.0.0)
       concurrent-ruby (~> 1.0)
     http_parser.rb (0.6.0)
+    json_schema (0.19.1)
     kramdown (1.17.0)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
     lumberjack (1.0.13)
-    method_source (0.9.0)
-    mini_portile2 (2.3.0)
+    method_source (0.9.2)
+    mini_portile2 (2.4.0)
     multi_json (1.13.1)
-    nanoc (4.9.3)
+    nanoc (4.11.0)
       addressable (~> 2.5)
-      cri (~> 2.8)
+      cri (~> 2.15)
       ddmemoize (~> 1.0)
       ddmetrics (~> 1.0)
       ddplugin (~> 1.0)
       hamster (~> 3.0)
+      json_schema (~> 0.19)
       parallel (~> 1.12)
       ref (~> 2.0)
       slow_enumerator_tools (~> 1.0)
       tomlrb (~> 1.2)
     nenv (0.3.0)
-    nokogiri (1.8.4)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.9.0)
+      mini_portile2 (~> 2.4.0)
     notiffany (0.1.1)
       nenv (~> 0.1)
       shellany (~> 0.0)
     parallel (1.12.1)
-    pry (0.11.3)
+    pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.2)
+    public_suffix (3.0.3)
     pygments.rb (1.2.1)
       multi_json (>= 1.0.0)
-    rack (2.0.5)
+    rack (2.0.6)
     rb-fchange (0.0.6)
       ffi
     rb-fsevent (0.10.3)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
-    redcarpet (3.2.0)
+    rb-inotify (0.10.0)
+      ffi (~> 1.0)
+    redcarpet (3.4.0)
     ref (2.0.0)
-    rspec (3.5.0)
-      rspec-core (~> 3.5.0)
-      rspec-expectations (~> 3.5.0)
-      rspec-mocks (~> 3.5.0)
-    rspec-core (3.5.4)
-      rspec-support (~> 3.5.0)
-    rspec-expectations (3.5.0)
+    rspec (3.8.0)
+      rspec-core (~> 3.8.0)
+      rspec-expectations (~> 3.8.0)
+      rspec-mocks (~> 3.8.0)
+    rspec-core (3.8.0)
+      rspec-support (~> 3.8.0)
+    rspec-expectations (3.8.2)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.5.0)
-    rspec-mocks (3.5.0)
+      rspec-support (~> 3.8.0)
+    rspec-mocks (3.8.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.5.0)
-    rspec-support (3.5.0)
+      rspec-support (~> 3.8.0)
+    rspec-support (3.8.0)
     ruby_dep (1.5.0)
     shellany (0.0.1)
     slow_enumerator_tools (1.1.0)
-    thor (0.20.0)
+    thor (0.20.3)
     tomlrb (1.2.7)
 
 PLATFORMS
@@ -124,4 +126,4 @@ DEPENDENCIES
   rspec
 
 BUNDLED WITH
-   1.16.2
+   1.17.2