Gemfile.lock in ffi-wiring_pi-0.5.0 vs Gemfile.lock in ffi-wiring_pi-0.6.0

@@ -1,16 +1,17 @@
 PATH
   remote: .
   specs:
-    ffi-wiring_pi (0.4.0)
+    ffi-wiring_pi (0.6.0)
       ffi (~> 1.0)
 
 GEM
   remote: https://rubygems.org/
   specs:
     diff-lcs (1.3)
     ffi (1.10.0)
+    rake (12.3.2)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
       rspec-expectations (~> 3.8.0)
       rspec-mocks (~> 3.8.0)
     rspec-core (3.8.0)
@@ -28,9 +29,10 @@
   ruby
 
 DEPENDENCIES
   bundler (~> 2.0)
   ffi-wiring_pi!
+  rake (~> 12.3.2)
   rspec (~> 3.8)
   yard (~> 0.9.1)
 
 BUNDLED WITH
    2.0.1