planning for next major version publish

[devoncarew]

Some brief planning for publishing the next major version (from conversations on dart-archive/lints#208 and #833):

• rev package:lints to the next stable version (5.0.0); publish
  • rev to 5.0.0 in preparation for publishing dart-archive/lints#210
• update package:flutter_lints to remove several const related lints; rev the dep on package:lints to 5.0.0; rev to the next major version; publish
  • [flutter_lints] remove prefer_const_constructors, prefer_const_declarations, prefer_const_literals_to_create_immutables flutter/packages#7688
  • [package:flutter_lints] update the dep on package:lints to 5.0.0 and the sdk dependency to 3.5.0 flutter/packages#7704
• add unintended_html_in_doc_comment to package:lints, rev to 5.1.0, publish
  • add unintended_html_in_doc_comment; rev to 5.1.0 dart-archive/lints#211

[devoncarew]

Mostly complete; we still need to publish the flutter_lints update.