prettier: change to single quoting

public/app/core/utils/react2angular.ts

@@ -1,4 +1,4 @@
-import coreModule from "app/core/core_module";
+import coreModule from 'app/core/core_module';
 
 export function react2AngularDirective(
   name: string,
@@ -6,9 +6,9 @@ export function react2AngularDirective(
   options: any
 ) {
   coreModule.directive(name, [
-    "reactDirective",
+    'reactDirective',
     reactDirective => {
       return reactDirective(component, options);
-    }
+    },
   ]);
 }