exercise-type-checker, 发现bug

[Hercules11]

exercize-type-checker/src/type-checker-entry3.js

function resolveType(targetType) {
	const tsTypeAnnotationMap = {
		TSStringKeyword: "string",
		TSNumberKeyword: "number",
	};
	switch (targetType.type) {
		case "TSTypeAnnotation":
            return tsTypeAnnotationMap[targetType.typeAnnotation.type]; // 失效了， 调试发现targetType对象没有TSTypeAnnotation属性
		case "NumberTypeAnnotation":
			return "number";
		case "StringTypeAnnotation":
			return "string";
	}
}