Prevent uninstalling bundler on newer rails

Author: JonRowe

script/downgrade_bundler_on_old_rails

@@ -5,7 +5,7 @@
 set -e
 source script/functions.sh
 
-if ruby -e "exit(ENV['RAILS_VERSION'].to_f < 5)"; then
+if ruby -e "exit(ENV['RAILS_VERSION'].scan(/\d+\.\d+.\d+/)[0].to_f < 5)"; then
   # On Rails versions less than 5, Bundler 2.0 is not supported
   echo "Warning dowgrading to older version of Bundler"
   gem uninstall -aIx bundler