Attempt to pin webdrivers on older Rails / Ruby

Author: JonRowe

example_app_generator/generate_app.rb

@@ -33,7 +33,7 @@
   # sqlite3 is an optional, unspecified, dependency and Rails 6.0 only supports `~> 1.4`
   gsub_file "Gemfile", /.*gem..sqlite3.*/, "gem 'sqlite3', '~> 1.4'"
 
-  gsub_file "Gemfile", /.*chromedriver-helper.*/, "gem 'webdrivers'"
+  gsub_file "Gemfile", /.*chromedriver-helper.*/, "gem 'webdrivers', '~> 5.3.0'"
 
   if RUBY_ENGINE == "jruby"
     gsub_file "Gemfile", /.*jdbc.*/, ''