bump excon dep

Gemfile.lock

@@ -3,7 +3,7 @@ PATH
   specs:
     fog (0.4.0)
       builder
-      excon (>= 0.3.7)
+      excon (>= 0.4.0)
       formatador (>= 0.0.16)
       json
       mime-types
@@ -15,7 +15,7 @@ GEM
   remote: http://rubygems.org/
   specs:
     builder (3.0.0)
-    excon (0.3.7)
+    excon (0.4.0)
     formatador (0.0.16)
     gestalt (0.0.11)
       formatador (>= 0.0.12)
@@ -35,7 +35,7 @@ PLATFORMS
 
 DEPENDENCIES
   builder
-  excon (>= 0.3.7)
+  excon (>= 0.4.0)
   fog!
   formatador (>= 0.0.16)
   json

fog.gemspec

@@ -43,7 +43,7 @@ Gem::Specification.new do |s|
   ## List your runtime dependencies here. Runtime dependencies are those
   ## that are needed for an end user to actually USE your code.
   s.add_dependency('builder')
-  s.add_dependency('excon', '>=0.3.7')
+  s.add_dependency('excon', '>=0.4.0')
   s.add_dependency('formatador', '>=0.0.16')
   s.add_dependency('json')
   s.add_dependency('mime-types')