Bump mathematical from 1.6.18 to 1.6.20

Bumps [mathematical](https://github.com/gjtorikian/mathematical) from 1.6.18 to 1.6.20.
- [Release notes](https://github.com/gjtorikian/mathematical/releases)
- [Changelog](https://github.com/gjtorikian/mathematical/blob/main/CHANGELOG.md)
- [Commits](gjtorikian/mathematical@v1.6.18...v1.6.20)

---
updated-dependencies:
- dependency-name: mathematical
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -17,7 +17,6 @@ GEM
   specs:
     ast (2.4.2)
     base64 (0.1.1)
-    concurrent-ruby (1.2.2)
     docopt (0.6.1)
     domain_name (0.6.20240107)
     event_emitter (0.2.6)
@@ -29,12 +28,10 @@ GEM
     httparty (0.21.0)
       mini_mime (>= 1.0.0)
       multi_xml (>= 0.5.2)
-    i18n (1.14.1)
-      concurrent-ruby (~> 1.0)
     json (2.6.3)
     language_server-protocol (3.17.0.3)
-    mathematical (1.6.18)
-      ruby-enum (~> 0.4)
+    mathematical (1.6.20)
+      ruby-enum (>= 0.4, < 2.0)
     mime-types (3.5.2)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2024.0604)
@@ -71,8 +68,7 @@ GEM
       unicode-display_width (>= 2.4.0, < 3.0)
     rubocop-ast (1.29.0)
       parser (>= 3.2.1.0)
-    ruby-enum (0.9.0)
-      i18n
+    ruby-enum (1.0.0)
     ruby-progressbar (1.13.0)
     unicode-display_width (2.4.2)
     websocket (1.2.10)