bump-formula-pr: handle pypi url version changes

Library/Homebrew/dev-cmd/bump-formula-pr.rb

@@ -183,6 +183,11 @@ module Homebrew
     elsif !new_url && !new_version
       odie "#{formula}: no --url= or --version= argument specified!"
     else
+      new_url ||= if old_url.start_with?(PyPI::PYTHONHOSTED_URL_PREFIX)
+        package_name = File.basename(old_url).match(/^(.+)-[a-z\d.]+$/)[1]
+        _, url = PyPI.get_pypi_info(package_name, new_version)
+        url
+      end
       new_url ||= old_url.gsub(old_version, new_version)
       if new_url == old_url
         odie <<~EOS