fix: security vulnerability and eslint error

Author: codeDebugTest

demo/App.vue

@@ -3,11 +3,18 @@
         <code-diff-viewer :new-content="newStr" :old-content="oldStr" title="测试删除"/>
         <code-diff-viewer :new-content="oldStr" :old-content="newStr" title="测试添加"/>
         <code-diff-viewer :new-content="modifiedStr" :old-content="oldStr" title="测试修改"/>
+        <code-diff-viewer v-for="changedFile in changedFiles"
+            :key="changedFile.fileName"
+            :new-content="changedFile.current"
+            :old-content="changedFile.last"
+            :title="changedFile.fileName"
+        />
     </div>
 </template>
 
 <script>
 import CodeDiffViewer from '../src/components/CodeDiffViewer.vue';
+import files from './utils';
 
 export default {
     name: 'app',
@@ -16,6 +23,7 @@ export default {
     },
     data() {
         return {
+            changedFiles: Object.freeze(files),
             oldStr: '',
             newStr: ''
         };