setting Bourbon spec version requirement to 4.0.1 and Neat spec version requirements to 1.6.0

Gemfile.lock

@@ -2,34 +2,34 @@ GEM
   remote: https://rubygems.org/
   specs:
     addressable (2.3.5)
-    bourbon (3.1.8)
-      sass (>= 3.2.0)
+    bourbon (4.0.2)
+      sass (~> 3.3)
       thor
     colorize (0.5.8)
     dalli (2.6.4)
     ffi (1.9.0)
     launchy (2.1.2)
       addressable (~> 2.3)
-    neat (1.4.0)
-      bourbon (>= 2.1)
-      sass (>= 3.2)
+    neat (1.6.0)
+      bourbon (>= 3.1)
+      sass (>= 3.3)
     rake (10.0.4)
     rb-fsevent (0.9.3)
     rb-inotify (0.9.2)
       ffi (>= 0.5.0)
     sass (3.3.5)
     sys-proctable (0.9.3)
-    thor (0.18.1)
+    thor (0.19.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  bourbon (~> 3.1.8)
+  bourbon (~> 4.0.1)
   colorize (~> 0.5.8)
   dalli (~> 2.6.4)
   launchy (~> 2.1.2)
-  neat (~> 1.4.0)
+  neat (~> 1.6.0)
   rake (~> 10.0.3)
   rb-fsevent (~> 0.9.3)
   rb-inotify (~> 0.9)