Update dependency rubocop to v1.60.0

Gemfile.lock

@@ -11,7 +11,6 @@ GEM
     addressable (2.8.3)
       public_suffix (>= 2.0.2, < 6.0)
     ast (2.4.2)
-    base64 (0.1.1)
     diff-lcs (1.5.0)
     faraday (1.2.0)
       multipart-post (>= 1.2, < 3)
@@ -23,7 +22,7 @@ GEM
       multi_json (~> 1.11)
       os (>= 0.9, < 2.0)
       signet (~> 0.15)
-    json (2.6.3)
+    json (2.7.1)
     jwt (2.7.0)
     language_server-protocol (3.17.0.3)
     launchy (2.5.2)
@@ -32,15 +31,15 @@ GEM
     multi_json (1.15.0)
     multipart-post (2.3.0)
     os (1.1.4)
-    parallel (1.23.0)
-    parser (3.2.2.4)
+    parallel (1.24.0)
+    parser (3.3.0.3)
       ast (~> 2.4.1)
       racc
     public_suffix (5.0.1)
-    racc (1.7.1)
+    racc (1.7.3)
     rainbow (3.1.1)
     rake (13.1.0)
-    regexp_parser (2.8.2)
+    regexp_parser (2.9.0)
     rexml (3.2.6)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
@@ -55,19 +54,18 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
     rspec-support (3.12.0)
-    rubocop (1.57.1)
-      base64 (~> 0.1.1)
+    rubocop (1.60.0)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
-      parser (>= 3.2.2.4)
+      parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.28.1, < 2.0)
+      rubocop-ast (>= 1.30.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.29.0)
+    rubocop-ast (1.30.0)
       parser (>= 3.2.1.0)
     ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)