You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: version_syntax_converter.rb
    path of file: ./repos/react_on_rails/lib/react_on_rails
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

requi
    
    def npm_to_rubygem(npm_version)
      match = npm_version
              .tr("-", ".")
              .strip
              .match(/(\d.*)/)
      match.present? ? match[0] : nil
    end