Gemfile.lock in rack-action_logger-0.1.9 vs Gemfile.lock in rack-action_logger-0.2.0

@@ -1,9 +1,9 @@
 PATH
   remote: .
   specs:
-    rack-action_logger (0.1.9)
+    rack-action_logger (0.2.0)
       activesupport
       fluent-logger (~> 0.5)
       woothee (~> 1.4)
 
 GEM
@@ -14,13 +14,15 @@
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     concurrent-ruby (1.0.2)
     diff-lcs (1.2.5)
+    docile (1.1.5)
     fluent-logger (0.6.1)
       msgpack (>= 0.5.6, < 2)
     i18n (0.7.0)
+    json (2.0.2)
     minitest (5.9.1)
     msgpack (1.0.2)
     rack (2.0.1)
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -36,10 +38,15 @@
       rspec-support (~> 3.5.0)
     rspec-mocks (3.5.0)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.5.0)
     rspec-support (3.5.0)
+    simplecov (0.12.0)
+      docile (~> 1.1.0)
+      json (>= 1.8, < 3)
+      simplecov-html (~> 0.10.0)
+    simplecov-html (0.10.0)
     thread_safe (0.3.5)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
     woothee (1.5.0)
 
@@ -50,8 +57,9 @@
   bundler (~> 1.13)
   rack-action_logger!
   rack-test (~> 0.6.3)
   rake (~> 10.0)
   rspec (~> 3.0)
+  simplecov
 
 BUNDLED WITH
    1.13.6