Gemfile.lock in u-struct-0.6.0 vs Gemfile.lock in u-struct-0.7.0

@@ -1,22 +1,30 @@
 PATH
   remote: .
   specs:
-    u-struct (0.6.0)
+    u-struct (0.7.0)
 
 GEM
   remote: https://rubygems.org/
   specs:
+    docile (1.4.0)
     minitest (5.14.4)
     rake (13.0.6)
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.3)
 
 PLATFORMS
   x86_64-darwin-19
 
 DEPENDENCIES
   bundler
   minitest (~> 5.0)
   rake (~> 13.0)
+  simplecov (~> 0.21.2)
   u-struct!
 
 BUNDLED WITH
    2.2.32