title: Liferay versions and correct dependencies
body: <p>I'm rather new to Liferay, Maven and Java so it may be more of a general question about dependencies. I am maintaining a Liferay portlet that has been migrated from 6.2 to 7.1 and there are a number of Liferay maven dependencies with version numbers (eg. com.liferay.portal.kernel). </p>
  
  <p>How does one know which versions of these dependencies one is to use for the version of the product that they are using? </p>
  
  <p>Is this a typical case where one should always be trying to use the most recent version of dependencies even if the version of the product is a minor release behind?</p>