Bump rubocop-ast from 1.19.1 to 1.31.2

Bumps [rubocop-ast](https://github.com/rubocop/rubocop-ast) from 1.19.1 to 1.31.2.
- [Release notes](https://github.com/rubocop/rubocop-ast/releases)
- [Changelog](https://github.com/rubocop/rubocop-ast/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-ast@v1.19.1...v1.31.2)

---
updated-dependencies:
- dependency-name: rubocop-ast
  dependency-type: indirect
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -55,8 +55,9 @@ GEM
     mustache (0.99.8)
     netrc (0.11.0)
     parallel (1.22.1)
-    parser (3.1.2.0)
+    parser (3.3.0.5)
       ast (~> 2.4.1)
+      racc
     pleaserun (0.0.32)
       cabin (> 0)
       clamp
@@ -67,6 +68,7 @@ GEM
     pry (0.14.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
+    racc (1.7.3)
     rack (2.2.4)
     rainbow (3.1.1)
     rchardet (1.8.0)
@@ -100,8 +102,8 @@ GEM
       rubocop-ast (>= 1.18.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.19.1)
-      parser (>= 3.1.1.0)
+    rubocop-ast (1.31.2)
+      parser (>= 3.3.0.4)
     rubocop-performance (1.14.2)
       rubocop (>= 1.7.0, < 2.0)
       rubocop-ast (>= 0.4.0)