Add the sniff TYPO3SniffPool.ControlStructures.SwitchDeclaration

Fixes #4
Add Sniffs/WhiteSpace/ScopeClosingBraceSniff

Fixes #6
Add Sniffs/ControlStructures/TernaryConditionalOperatorSniff

Fixes #5
Add TYPO3SniffPool_Sniffs_Files_FilenameSniff

Fixes #3
Add FileExtensionSniff to the TYPO3CMS standard

Fixes #2
Raise minimum version of PHPSniffPool