def bump_version(file)
  content = File.read(file)
  versions_parts = content.match(/s\.version\s+=\s'(\d+)\.(\d+)\.(\d+)'/).to_a
  content.gsub!(/s\.version\s+=\s'\d+\.\d+\.\d+'/, "s.version         = '#{versions_parts[1]}.#{versions_parts[2]}.#{versions_parts[3].to_i + 1}'")

  File.open(file, 'w') do |f|
    f.write(content)
  end
end