Upgrade gems

Gemfile

@@ -18,7 +18,7 @@ gem 'omniauth-github'
 gem 'omniauth-twitter'
 gem 'omniauth-facebook'
 gem 'omniauth-google-oauth2'
-gem 'cancancan'
+gem 'cancancan', '~> 2.0'
 gem 'gravtastic'
 gem 'rails-timeago'
 gem 'bcrypt'

Gemfile.lock

@@ -113,7 +113,7 @@ GEM
       railties (>= 4.2.0)
     faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
-    ffi (1.10.0)
+    ffi (1.11.1)
     font-awesome-sass-rails (3.0.2.2)
       railties (>= 3.1.1)
       sass-rails (>= 3.1.1)
@@ -139,7 +139,7 @@ GEM
     has_scope (0.7.2)
       actionpack (>= 4.1)
       activesupport (>= 4.1)
-    hashdiff (0.3.8)
+    hashdiff (0.4.0)
     hashie (3.6.0)
     i18n (1.6.0)
       concurrent-ruby (~> 1.0)
@@ -151,8 +151,8 @@ GEM
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     json (2.2.0)
-    jwt (2.1.0)
-    leaflet-rails (1.3.1)
+    jwt (2.2.1)
+    leaflet-rails (1.4.0)
       rails (>= 4.2.0)
     libv8 (7.3.492.27.1)
     listen (3.1.5)
@@ -173,7 +173,7 @@ GEM
     minitest (5.11.3)
     multi_json (1.13.1)
     multi_xml (0.6.0)
-    multipart-post (2.0.0)
+    multipart-post (2.1.1)
     nenv (0.3.0)
     nio4r (2.3.1)
     nokogiri (1.10.3)
@@ -212,9 +212,9 @@ GEM
       rack
     paginate-responder (2.1.0)
       rack-link_headers (>= 2.2)
-    parallel (1.16.0)
+    parallel (1.17.0)
     parse-cron (0.1.4)
-    parser (2.6.2.0)
+    parser (2.6.3.0)
       ast (~> 2.4.0)
     pg (1.1.4)
     poltergeist (1.18.1)
@@ -290,7 +290,7 @@ GEM
       rspec-expectations (>= 2.99.0.beta1)
     rspec-core (3.8.0)
       rspec-support (~> 3.8.0)
-    rspec-expectations (3.8.2)
+    rspec-expectations (3.8.3)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.8.0)
     rspec-its (1.3.0)
@@ -318,10 +318,10 @@ GEM
       unicode-display_width (~> 1.0, >= 1.0.1)
     rubocop-rspec (1.30.0)
       rubocop (>= 0.58.0)
-    ruby-progressbar (1.10.0)
+    ruby-progressbar (1.10.1)
     ruby_dep (1.5.0)
     safe_yaml (1.0.5)
-    sass (3.7.3)
+    sass (3.7.4)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -371,7 +371,7 @@ GEM
       thread_safe (~> 0.1)
     uglifier (4.1.20)
       execjs (>= 0.3.0, < 3)
-    unicode-display_width (1.5.0)
+    unicode-display_width (1.6.0)
     webmock (3.5.1)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
@@ -396,7 +396,7 @@ DEPENDENCIES
   bcrypt
   bourbon (~> 5.1)
   brakeman
-  cancancan
+  cancancan (~> 2.0)
   cany (~> 0.5.0)
   capybara
   coffee-rails (~> 4.2.0)