Bump autoprefixer-rails from 10.4.16.0 to 10.4.19.0

Bumps [autoprefixer-rails](https://github.com/ai/autoprefixer-rails) from 10.4.16.0 to 10.4.19.0.
- [Changelog](https://github.com/ai/autoprefixer-rails/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ai/autoprefixer-rails/compare/10.4.16.0...10.4.19.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -93,7 +93,7 @@ GEM
     audited (5.4.3)
       activerecord (>= 5.0, < 7.2)
       request_store (~> 1.2)
-    autoprefixer-rails (10.4.16.0)
+    autoprefixer-rails (10.4.19.0)
       execjs (~> 2)
     base64 (0.2.0)
     bcrypt (3.1.20)
@@ -208,7 +208,7 @@ GEM
       execjs
       multi_json (>= 1.3)
       rake
-    execjs (2.8.1)
+    execjs (2.9.1)
     exiftool (1.2.5)
       json
     exiftool_vendored (12.80.0)
@@ -700,7 +700,7 @@ DEPENDENCIES
   airbrake (~> 13.0.4)
   ancestry (~> 4.3.3)
   audited (~> 5.4.3)
-  autoprefixer-rails (~> 10.4.16)
+  autoprefixer-rails (~> 10.4.19)
   bing_translator (~> 6.2.0)
   cancancan (~> 3.5.0)
   capistrano (~> 3.19.1)