Update gemfile lock

Gemfile.lock

@@ -99,6 +99,12 @@ GEM
       climate_control (>= 0.0.3, < 1.0)
     coderay (1.1.1)
     concurrent-ruby (1.0.5)
+    coveralls (0.8.21)
+      json (>= 1.8, < 3)
+      simplecov (~> 0.14.1)
+      term-ansicolor (~> 1.3)
+      thor (~> 0.19.4)
+      tins (~> 1.6)
     daemons (1.2.4)
     database_cleaner (1.6.1)
     diff-lcs (1.3)
@@ -254,12 +260,15 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
+    term-ansicolor (1.6.0)
+      tins (~> 1.0)
     thin (1.7.0)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
     thor (0.19.4)
     thread_safe (0.3.6)
+    tins (1.15.0)
     tzinfo (1.2.3)
       thread_safe (~> 0.1)
     warden (1.2.7)
@@ -273,6 +282,7 @@ PLATFORMS
 
 DEPENDENCIES
   active_model_serializers
+  coveralls
   database_cleaner
   delayed_job!
   delayed_job_active_record!