Changelog for v2.12.3

• bug #3867 PhpdocAnnotationWithoutDotFixer - Handle trailing whitespaces (kubawerlos)
• bug #3884 NoSuperfluousPhpdocTagsFixer - handle null in every position (dmvdbrugge, julienfalque)
• bug #3885 AlignMultilineCommentFixer - ArrayIndentationFixer - Priority (dmvdbrugge)
• bug #3887 ArrayIndentFixer - Don't indent empty lines (dmvdbrugge)
• bug #3888 NoExtraBlankLinesFixer - remove blank lines after open tag (kubawerlos)
• bug #3890 StrictParamFixer - make it case-insensitive (kubawerlos)
• bug #3895 FunctionsAnalyzer - false positive for constant and function definition (kubawerlos)
• bug #3908 StrictParamFixer - fix edge case (kubawerlos)
• bug #3910 FunctionsAnalyzer - fix isGlobalFunctionCall (gharlan)
• bug #3912 FullyQualifiedStrictTypesFixer - NoSuperfluousPhpdocTagsFixer - adjust priority (dmvdbrugge)
• bug #3913 TokensAnalyzer - fix isConstantInvocation (gharlan, keradus)
• bug #3921 TypeAnalysis - Fix iterable not being detected as a reserved type (ntzm)
• bug #3924 FullyQualifiedStrictTypesFixer - space bug (dmvdbrugge)
• bug #3937 LowercaseStaticReferenceFixer - Fix "Parent" word in namespace (kubawerlos)
• bug #3944 ExplicitStringVariableFixer - fix array handling (gharlan)
• bug #3951 NoSuperfluousPhpdocTagsFixer - do not call strtolower with null (SpacePossum)
• bug #3954 NoSuperfluousPhpdocTagsFixer - Index invalid or out of range (kubawerlos)
• bug #3957 NoTrailingWhitespaceFixer - trim space after opening tag (kubawerlos)
• minor #3798 DX: enable native_function_invocation (keradus)
• minor #3882 PhpdocAnnotationWithoutDotFixer - Handle empty line in comment (kubawerlos)
• minor #3889 DX: Cleanup - remove unused variables (kubawerlos, SpacePossum)
• minor #3891 PhpdocNoEmptyReturnFixer - account for null[] (dmvdbrugge)
• minor #3892 PhpdocNoEmptyReturnFixer - fix docs (keradus)
• minor #3897 DX: FunctionsAnalyzer - simplifying return expression (kubawerlos)
• minor #3903 DX: cleanup - remove special treatment for PHP <5.6 (kubawerlos)
• minor #3905 DX: Upgrade composer-require-checker to stable version (keradus)
• minor #3919 Simplify single uses of Token::isGivenKind (ntzm)
• minor #3920 Docs: Fix typo (ntzm)
• minor #3940 DX: fix phpdoc parameter type (malukenho)
• minor #3948 DX: cleanup - remove redundant @param annotations (kubawerlos)
• minor #3950 Circle CI v2 yml (siad007)
• minor #3952 DX: AbstractFixerTestCase - drop testing method already provided by trait (keradus)
• minor #3973 Bump xdebug-handler (keradus)