Update coveralls to version 0.8.11

Gemfile.lock

@@ -49,9 +49,8 @@ GEM
       execjs
     coffee-script-source (1.10.0)
     concurrent-ruby (1.0.0)
-    coveralls (0.8.10)
+    coveralls (0.8.11)
       json (~> 1.8)
-      rest-client (>= 1.6.8, < 2)
       simplecov (~> 0.11.0)
       term-ansicolor (~> 1.3)
       thor (~> 0.19.1)
@@ -66,8 +65,6 @@ GEM
       thread_safe (~> 0.1)
       warden (~> 1.2.3)
     docile (1.1.5)
-    domain_name (0.5.20160128)
-      unf (>= 0.0.5, < 1.0.0)
     erubis (2.7.0)
     execjs (2.6.0)
     fastercsv (1.5.5)
@@ -79,8 +76,6 @@ GEM
     haml (4.0.7)
       tilt
     hashdiff (0.3.0)
-    http-cookie (1.0.2)
-      domain_name (~> 0.5)
     http_accept_language (2.0.5)
     i18n (0.7.0)
     jquery-rails (4.1.0)
@@ -101,7 +96,6 @@ GEM
     mini_portile2 (2.0.0)
     minitest (5.8.4)
     nested_form (0.3.2)
-    netrc (0.11.0)
     nokogiri (1.6.7.2)
       mini_portile2 (~> 2.0.0.rc2)
     orm_adapter (0.5.0)
@@ -164,10 +158,6 @@ GEM
     remotipart (1.2.1)
     responders (2.1.1)
       railties (>= 4.2.0, < 5.1)
-    rest-client (1.8.0)
-      http-cookie (>= 1.0.2, < 2.0)
-      mime-types (>= 1.16, < 3.0)
-      netrc (~> 0.7)
     rubocop (0.37.2)
       parser (>= 2.3.0.4, < 3.0)
       powerpack (~> 0.1)
@@ -210,9 +200,6 @@ GEM
     uglifier (2.7.2)
       execjs (>= 0.3.0)
       json (>= 1.8.0)
-    unf (0.1.4)
-      unf_ext
-    unf_ext (0.0.7.2)
     unicode-display_width (0.3.1)
     validates_formatting_of (0.9.0)
       activemodel