chore(deps): bump rubocop-rails from 2.23.1 to 2.24.0

Bumps [rubocop-rails](https://github.com/rubocop/rubocop-rails) from 2.23.1 to 2.24.0.
- [Release notes](https://github.com/rubocop/rubocop-rails/releases)
- [Changelog](https://github.com/rubocop/rubocop-rails/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rails@v2.23.1...v2.24.0)

---
updated-dependencies:
- dependency-name: rubocop-rails
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -134,8 +134,7 @@ GEM
     dotenv-rails (3.1.0)
       dotenv (= 3.1.0)
       railties (>= 6.1)
-    drb (2.2.0)
-      ruby2_keywords
+    drb (2.2.1)
     erubi (1.12.0)
     faraday (1.10.3)
       faraday-em_http (~> 1.0)
@@ -257,7 +256,6 @@ GEM
       actionmailer (>= 3)
       net-smtp
       premailer (~> 1.7, >= 1.7.9)
-    prism (0.24.0)
     psych (5.1.2)
       stringio
     public_suffix (5.0.4)
@@ -352,17 +350,16 @@ GEM
       rubocop-ast (>= 1.30.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.31.0)
+    rubocop-ast (1.31.1)
       parser (>= 3.3.0.4)
-      prism (>= 0.24.0)
     rubocop-performance (1.20.2)
       rubocop (>= 1.48.1, < 2.0)
       rubocop-ast (>= 1.30.0, < 2.0)
-    rubocop-rails (2.23.1)
+    rubocop-rails (2.24.0)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.33.0, < 2.0)
-      rubocop-ast (>= 1.30.0, < 2.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
     ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
     sass-rails (6.0.0)