[修复] 修复课程类型异常

mock/serializers/CourseSerializer.js

@@ -1,5 +1,5 @@
 const makeId = require("../util/makeId");
-const UserSerializer = require("./UserSerializer");
+const userSerializer = require("./UserSerializer");
 
 /**
  * @description 课程信息
@@ -19,6 +19,6 @@ module.exports = () => {
     id: makeId(),
     name: "软件工程第二阶段 2018",
     code: "xxxxx",
-    teacher: UserSerializer("TEACHER")
+    teacher: userSerializer("TEACHER")
   };
 };