v0.17.0

• More correctly deal with indentation inside documentation comments,
  fixing a set of minor markdown problems relating to indentation (like list
  handling) (#1608, #1507)
• Strong mode enabled in dartdoc -- dartdoc will no longer read code
  that isn't strong-mode clean beginning with this version. (#1561)
• Add a negatable flag (default on), --validate-links, to control whether
  Dartdoc's built-in link checker runs. (#1607)
• dartdoc now works in checked mode for Flutter, fixing some edge-case
  navigation/canonicalization problems. (#1606)
• Dartdoc now uses AnalysisDriver to build the element tree. (#1601, #1586)
• Grinder now has arbitrary serving of pub packages and can compare
  warnings from different versions (#1600, #1599)