Checkstyle 8.30

[Roman Ivanov]

Checkstyle 8.30 - https://checkstyle.org/releasenotes.html#Release_8.30

New:

  New check: AvoidDoubleBraceInitialization

Bug fixes:

  False-positive RightCurly in google_checks since 8.20

  GenericWhitespace complains about normal spacing with generic constructor

  NewlineAtEndOfFile=lf does not create error when file uses crlf

Notes:

  Update doc for StringLiteralEquality

  Update doc for MissingSwitchDefault

  Update doc for WhitespaceAfter

  doc: fix indentation of config example

  doc: add example of non-instance member for MemberNameCheck

  Code samples for Naming Checks

  doc: deprecated -> Deprecated

  Add warning message at style coverage pages that referenced config is not released

  Change line number comparisons to use common isOnSameLine method

  Xpath implementation: relationship between getLocalPart and getStringValue 

  Put in doc reason why ENUM_CONSTANT_DEF and LAMBDA tokens are not supported in RightCurlyCheck

  doc: fix typo training -> trailing

  Mark DetailAST::getNumberOfChildren as deprecated

  PMD warnings about duplicate rules

  automation of github actions for release.sh

  update release.sh with minor improvments