Support typed parameters

Co-Authored-By: Eric Shimizu Karbstein <[email protected]>

Author: aminya

grammars/tree-sitter-python.cson

@@ -117,6 +117,7 @@ scopes:
   'default_parameter > identifier:nth-child(0)': 'variable.parameter.function'
   'keyword_argument > identifier:nth-child(0)': 'variable.parameter.function'
   'lambda_parameters > identifier': 'variable.parameter.function'
+  'typed_parameter > identifier': 'variable.parameter.function'
 
   '"if"': 'keyword.control'
   '"else"': 'keyword.control'