Bump cookstyle from 3.0.0 to 6.21.1

Gemfile.lock

@@ -18,7 +18,7 @@ GEM
       tzinfo (~> 1.1)
     addressable (2.5.2)
       public_suffix (>= 2.0.2, < 4.0)
-    ast (2.4.0)
+    ast (2.4.1)
     aws-sdk (2.11.183)
       aws-sdk-resources (= 2.11.183)
     aws-sdk-core (2.11.183)
@@ -96,8 +96,8 @@ GEM
     cleanroom (1.0.0)
     coderay (1.1.2)
     concurrent-ruby (1.1.4)
-    cookstyle (3.0.0)
-      rubocop (= 0.55.0)
+    cookstyle (6.21.1)
+      rubocop (= 0.93.1)
     cucumber-core (3.2.1)
       backports (>= 3.8.0)
       cucumber-tag_expressions (~> 1.1.0)
@@ -244,12 +244,11 @@ GEM
       plist (~> 3.1)
       systemu (~> 2.6.4)
       wmi-lite (~> 1.0)
-    parallel (1.12.1)
-    parser (2.5.1.2)
-      ast (~> 2.4.0)
+    parallel (1.19.2)
+    parser (2.7.2.0)
+      ast (~> 2.4.1)
     plist (3.5.0)
     polyglot (0.3.5)
-    powerpack (0.1.2)
     proxifier (1.0.3)
     pry (0.12.2)
       coderay (~> 1.1.0)
@@ -261,8 +260,10 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
+    regexp_parser (1.8.2)
     retriable (2.1.0)
     retryable (2.0.4)
+    rexml (3.2.4)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
       rspec-expectations (~> 3.8.0)
@@ -282,14 +283,18 @@ GEM
     rspec_junit_formatter (0.2.3)
       builder (< 4)
       rspec-core (>= 2, < 4, != 2.12.0)
-    rubocop (0.55.0)
+    rubocop (0.93.1)
       parallel (~> 1.10)
-      parser (>= 2.5)
-      powerpack (~> 0.1)
+      parser (>= 2.7.1.5)
       rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8)
+      rexml
+      rubocop-ast (>= 0.6.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (~> 1.0, >= 1.0.1)
-    ruby-progressbar (1.10.0)
+      unicode-display_width (>= 1.4.0, < 2.0)
+    rubocop-ast (1.1.0)
+      parser (>= 2.7.1.5)
+    ruby-progressbar (1.10.1)
     ruby_dep (1.5.0)
     ruby_gntp (0.3.4)
     rubyntlm (0.6.2)
@@ -336,7 +341,7 @@ GEM
       polyglot (~> 0.3)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    unicode-display_width (1.4.0)
+    unicode-display_width (1.7.0)
     uuidtools (2.1.5)
     winrm (2.3.1)
       builder (>= 2.1.2)