Bump coveralls version

Addresses security issues in its rest-client dependencies:

- https://github.com/rest-client/rest-client/issues/369
- http://www.osvdb.org/show/osvdb/117461

Gemfile

@@ -125,7 +125,7 @@ group :development, :test do
   gem 'rb-inotify', require: linux_only('rb-inotify')
   gem "simplecov", require: false
-  gem 'coveralls', require: false
+  gem 'coveralls', '~> 0.8.2', require: false
   gem 'rubocop', '0.28.0', require: false
 end

Gemfile.lock

@@ -85,12 +85,12 @@ GEM
     colored (1.2)
     columnize (0.9.0)
     connection_pool (1.2.0)
-    coveralls (0.7.0)
-      multi_json (~> 1.3)
-      rest-client
-      simplecov (>= 0.7)
-      term-ansicolor
-      thor
+    coveralls (0.8.2)
+      json (~> 1.8)
+      rest-client (>= 1.6.8, < 2)
+      simplecov (~> 0.10.0)
+      term-ansicolor (~> 1.3)
+      thor (~> 0.19.1)
     crack (0.4.1)
       safe_yaml (~> 0.9.0)
     database_cleaner (1.3.0)
@@ -100,7 +100,9 @@ GEM
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)
     diff-lcs (1.2.5)
-    docile (1.1.1)
+    docile (1.1.5)
+    domain_name (0.5.24)
+      unf (>= 0.0.5, < 1.0.0)
     dotenv (0.9.0)
     email_spec (1.5.0)
       launchy (~> 2.1)
@@ -219,6 +221,8 @@ GEM
     hipchat (1.5.0)
       httparty
       mimemagic
+    http-cookie (1.0.2)
+      domain_name (~> 0.5)
     httparty (0.11.0)
       multi_json (~> 1.0)
       multi_xml (>= 0.5.2)
@@ -262,6 +266,7 @@ GEM
     net-scp (1.2.1)
       net-ssh (>= 2.6.5)
     net-ssh (2.9.2)
+    netrc (0.10.3)
     nokogiri (1.6.6.2)
       mini_portile (~> 0.6.0)
     nprogress-rails (0.1.2.3)
@@ -331,8 +336,10 @@ GEM
     redis (3.0.6)
     redis-namespace (1.4.1)
       redis (~> 3.0.4)
-    rest-client (1.6.7)
-      mime-types (>= 1.16)
+    rest-client (1.8.0)
+      http-cookie (>= 1.0.2, < 2.0)
+      mime-types (>= 1.16, < 3.0)
+      netrc (~> 0.7)
     rspec (2.14.1)
       rspec-core (~> 2.14.0)
       rspec-expectations (~> 2.14.0)
@@ -377,11 +384,11 @@ GEM
       json
       redis (>= 3.0.4)
       redis-namespace (>= 1.3.1)
-    simplecov (0.8.2)
+    simplecov (0.10.0)
       docile (~> 1.1.0)
-      multi_json
-      simplecov-html (~> 0.8.0)
-    simplecov-html (0.8.0)
+      json (~> 1.8)
+      simplecov-html (~> 0.10.0)
+    simplecov-html (0.10.0)
     sinatra (1.4.4)
       rack (~> 1.4)
       rack-protection (~> 1.4)
@@ -406,14 +413,14 @@ GEM
     stamp (0.5.0)
     state_machine (1.2.0)
     temple (0.6.7)
-    term-ansicolor (1.2.2)
-      tins (~> 0.8)
+    term-ansicolor (1.3.2)
+      tins (~> 1.0)
     terminal-table (1.4.5)
     thor (0.19.1)
     thread_safe (0.3.5)
     tilt (1.4.1)
     timers (1.1.0)
-    tins (0.13.1)
+    tins (1.5.4)
     trollop (2.1.2)
     turbolinks (2.0.0)
       coffee-rails
@@ -458,7 +465,7 @@ DEPENDENCIES
   capybara
   coffee-rails (~> 4.0.0)
   colored
-  coveralls
+  coveralls (~> 0.8.2)
   database_cleaner
   default_value_for (~> 3.0.0)
   email_spec