fix ts lint warning: Strings must use singlequote

frontend/src/components/main/NodeItem.vue

@@ -92,11 +92,11 @@ export default defineComponent({
   },
   emits: [
     'addNode',
-    "nodeSelected",
-    "nodeEdit",
-    "deleteNode",
-    "deleteAllNextNodes",
-    "copyFlow"
+    'nodeSelected',
+    'nodeEdit',
+    'deleteNode',
+    'deleteAllNextNodes',
+    'copyFlow'
   ],
   setup(props, context) {
     const store = useFlowEditorStore();
@@ -204,7 +204,7 @@ export default defineComponent({
      * 変数名取得
      */
     const varName =(node:IActionNode)=>{
-      const prop = node.actionProps.find((prop) => prop.props.name === "verName");
+      const prop = node.actionProps.find((prop) => prop.props.name === 'verName');
       return prop?.props.modelValue.name;
     };
     const copyFlow=()=>{

frontend/src/components/main/NodeLine.vue

@@ -31,11 +31,11 @@
 import { ref, defineComponent, computed, PropType } from 'vue';
 import { IActionNode, ActionNode, ActionFlow, RootAction } from '../../types/ActionTypes';
 export enum Direction {
-  Default = "None",
-  Left = "LEFT",
-  Right = "RIGHT",
-  LeftNotNext = "LEFTNOTNEXT",
-  RightNotNext = "RIGHTNOTNEXT",
+  Default = 'None',
+  Left = 'LEFT',
+  Right = 'RIGHT',
+  LeftNotNext = 'LEFTNOTNEXT',
+  RightNotNext = 'RIGHTNOTNEXT',
 }
 export default defineComponent({
   name: 'NodeLine',