.rultor.yml in pdd-0.23.1 vs .rultor.yml in pdd-0.23.2

@@ -1,6 +1,6 @@
 docker:
-  image: yegor256/rultor-image:1.9.0
+  image: yegor256/rultor-image:1.20.0
 assets:
   rubygems.yml: yegor256/home#assets/rubygems.yml
 install: |
   pdd -f /dev/null
   sudo bundle install --no-color "--gemfile=$(pwd)/Gemfile"