bump rubocop

Gemfile

@@ -232,7 +232,7 @@ group :development do
 
   # Linters
   gem "jshintrb", "0.3.0"
-  gem "rubocop",  "0.35.1"
+  gem "rubocop",  "0.40.0"
 
   # Preloading environment
 

Gemfile.lock

@@ -55,8 +55,6 @@ GEM
       fog (>= 1.8.0)
       unf
     ast (2.2.0)
-    astrolabe (1.3.1)
-      parser (~> 2.2)
     autoprefixer-rails (6.3.6)
       execjs
     backbone-on-rails (1.2.0.0)
@@ -675,13 +673,12 @@ GEM
       rspec-mocks (~> 3.4.0)
       rspec-support (~> 3.4.0)
     rspec-support (3.4.1)
-    rubocop (0.35.1)
-      astrolabe (~> 1.3)
-      parser (>= 2.2.3.0, < 3.0)
+    rubocop (0.40.0)
+      parser (>= 2.3.1.0, < 3.0)
       powerpack (~> 0.1)
       rainbow (>= 1.99.1, < 3.0)
       ruby-progressbar (~> 1.7)
-      tins (<= 1.6.0)
+      unicode-display_width (~> 1.0, >= 1.0.1)
     ruby-oembed (0.10.0)
     ruby-progressbar (1.8.0)
     rubyzip (1.2.0)
@@ -751,7 +748,6 @@ GEM
     timecop (0.8.1)
     timers (4.0.4)
       hitimes
-    tins (1.6.0)
     trollop (2.1.2)
     turbo_dev_assets (0.0.2)
     twitter (5.16.0)
@@ -776,6 +772,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.2)
+    unicode-display_width (1.0.5)
     unicorn (5.1.0)
       kgio (~> 2.6)
       raindrops (~> 0.7)
@@ -900,7 +897,7 @@ DEPENDENCIES
   roxml (= 3.1.6)
   rspec-instafail (= 0.5.0)
   rspec-rails (= 3.4.2)
-  rubocop (= 0.35.1)
+  rubocop (= 0.40.0)
   ruby-oembed (= 0.10.0)
   rubyzip (= 1.2.0)
   sass-rails (= 5.0.4)