refactor(await-async-utils): move function definition outside

Author: Belco90

lib/rules/await-async-utils.js

@@ -87,12 +87,12 @@ function isAwaited(node) {
   return VALID_PARENTS.includes(node.type);
 }
 
+const hasAThenProperty = node =>
+  node.type === 'MemberExpression' && node.property.name === 'then';
+
 function isPromiseResolved(node) {
   const parent = node.parent;
 
-  const hasAThenProperty = node =>
-    node.type === 'MemberExpression' && node.property.name === 'then';
-
   // wait(...).then(...)
   if (parent.type === 'CallExpression') {
     return hasAThenProperty(parent.parent);