message: datasource_driver.yml.example add db version field
diff: # mysql:
  # name: mysql
  # desc: mysql
  +# version:
  # driver: com.mysql.jdbc.Driver
  # keyword_prefix: \`
  # keyword_suffix: \`
  # oracle:
  # name: oracle
  # desc: oracle
  +# version:
  # driver: oracle.jdbc.driver.OracleDriver
  # keyword_prefix: \"
  # keyword_suffix: \"
  