contributors of 1.9.0 release
prestep before release: bump to 1.9.0 version
Merge pull request #136 from baratali/iss58

Fixes #58. Update for CustomDeclarationOrderCheck.
Issue141. ConfusingConditionCheck and ForbidReturnInFinalBlockCheck were updated.
Merge pull request #142 from baratali/iss139

Warning message of ForbidWildcardAsReturnTypeCheck has been edited.
message in NoNullForCollectionReturnCheck fixed
Merge pull request #137 from sabaka/badMessage

New message for NoNullForCollectionReturnCheck
Merge pull request #143 from VadimPanasiuk/Issue141

Issue141.
Merge pull request #144 from baratali/iss32new

Fixes #32. Update for VariableDeclarationUsageDestanceCheck
148 fixed
Merge pull request #151 from sabaka/iss148

Bug in NoNullForCollectionReturnCheck fixed