update paperclip (#6)

because of security issue mentioned in thoughtbot/paperclip#2530

Gemfile.lock

@@ -1,11 +1,11 @@
 PATH
   remote: .
   specs:
-    graph_starter (0.16.2)
+    graph_starter (0.16.3)
       babosa (= 1.0.2)
       neo4j (>= 8.1.3)
-      neo4jrb-paperclip (= 0.0.3)
-      paperclip (~> 4.2.0)
+      neo4jrb-paperclip (= 0.0.5)
+      paperclip (~> 5.2.1)
       rails (~> 4.2.3)
       semantic-ui-sass (~> 2.1.3.0)
       slim-rails (~> 3.0.1)
@@ -112,18 +112,19 @@ GEM
       rake
       ruby-progressbar
       rubyzip (>= 1.1.7)
-    neo4jrb-paperclip (0.0.3)
-      neo4j (> 3.0.0.alpha.8)
-      paperclip (~> 4.0)
+    neo4jrb-paperclip (0.0.5)
+      neo4j (> 7.0.0)
+      paperclip (~> 5.2.1)
     nokogiri (1.6.7)
       mini_portile2 (~> 2.0.0.rc2)
     orm_adapter (0.5.0)
     os (1.0.0)
-    paperclip (4.2.4)
-      activemodel (>= 3.2.0)
-      activesupport (>= 3.2.0)
+    paperclip (5.2.1)
+      activemodel (>= 4.2.0)
+      activesupport (>= 4.2.0)
       cocaine (~> 0.5.5)
       mime-types
+      mimemagic (~> 0.3.0)
     rack (1.6.4)
     rack-test (0.6.3)
       rack (>= 1.0)

graph_starter.gemspec

@@ -21,8 +21,8 @@ Gem::Specification.new do |s|
   s.add_dependency "neo4j", ">= 8.1.3"
   s.add_dependency "semantic-ui-sass", "~> 2.1.3.0"
   s.add_dependency "slim-rails", "~> 3.0.1"
-  s.add_dependency "paperclip", "~> 4.2.0"
-  s.add_dependency "neo4jrb-paperclip", "0.0.3"
+  s.add_dependency "paperclip", "~> 5.2.1"
+  s.add_dependency "neo4jrb-paperclip", "0.0.5"
   s.add_dependency 'babosa', '1.0.2'
 
   s.add_development_dependency 'rspec-rails'