Fix type

Author: Bunlong

test/jsonToCSV.spec.ts

@@ -5,7 +5,7 @@ import { jsonToCSV } from '../src/jsonToCSV';
 describe('jsonToCSV', () => {
   // eslint-disable-next-line no-undef
   it('should return a csv format as expected', function () {
-    const fixtures = `[
+    const fixtures = [
       {
         "Column 1": "1-1",
         "Column 2": "1-2",
@@ -30,7 +30,7 @@ describe('jsonToCSV', () => {
         "Column 3": 6,
         "Column 4": 7
       }
-    ]`;
+    ];
     const expected = `Column 1,Column 2,Column 3,Column 4
 1-1,1-2,1-3,1-4
 2-1,2-2,2-3,2-4