Add match/case highlighting

Author: cdonovick

syntax/python.vim

@@ -105,6 +105,8 @@ else
     syn match   pythonStatement   '\<async\s\+def\>' nextgroup=pythonFunction skipwhite
     syn match   pythonStatement   '\<async\s\+with\>'
     syn match   pythonStatement   '\<async\s\+for\>'
+    syn match   pythonConditional  '^\s*\zsmatch\ze\s\+.\+:'
+    syn match   pythonConditional  '^\s+\zscase\ze\s\+.\+:'
     syn cluster pythonExpression contains=pythonStatement,pythonRepeat,pythonConditional,pythonOperator,pythonNumber,pythonHexNumber,pythonOctNumber,pythonBinNumber,pythonFloat,pythonString,pythonFString,pythonRawString,pythonRawFString,pythonBytes,pythonBoolean,pythonNone,pythonSingleton,pythonBuiltinObj,pythonBuiltinFunc,pythonBuiltinType,pythonClassVar
 endif