Prettier in test files

Author: toger5

package.json

@@ -31,11 +31,20 @@
     "overrides": [
       {
         "files": [
-          "src/**/*.ts"
+          "src/**/*.ts",
+          "test/**/*.ts"
         ],
         "options": {
           "tabWidth": 4
         }
+      },
+      {
+        "files": [
+          "test/**/*.ts"
+        ],
+        "options": {
+          "singleQuote": true
+        }
       }
     ]
   },