message: Mark tokenTypeMap values as nulalble
diff: @@ -312,7 +312,7 @@ tokenModifiers[DefaultTokenModifier.modification] = 'modification';
  tokenModifiers[DefaultTokenModifier.async] = 'async';
  tokenModifiers[DefaultTokenModifier.readonly] = 'readonly';
  -const tokenTypeMap: number[] = [];
  +const tokenTypeMap: (number | undefined)[] = [];
  tokenTypeMap[SemanticHighlightClassification.Comment] = DefaultTokenType.comment;
  tokenTypeMap[SemanticHighlightClassification.ExcludedCode] = CustomTokenType.excludedCode;
  tokenTypeMap[SemanticHighlightClassification.Identifier] = DefaultTokenType.variable;
  