Apply more let/const transforms.

_getFuncName.js

@@ -1,10 +1,10 @@
 import realNames from './_realNames.js';
 
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+const objectProto = Object.prototype;
 
 /** Used to check objects for own properties. */
-var hasOwnProperty = objectProto.hasOwnProperty;
+const hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Gets the name of `func`.
@@ -14,13 +14,13 @@ var hasOwnProperty = objectProto.hasOwnProperty;
  * @returns {string} Returns the function name.
  */
 function getFuncName(func) {
-  var result = `${ func.name }`,
-      array = realNames[result],
-      length = hasOwnProperty.call(realNames, result) ? array.length : 0;
+  const result = `${ func.name }`;
+  const array = realNames[result];
+  let length = hasOwnProperty.call(realNames, result) ? array.length : 0;
 
   while (length--) {
-    var data = array[length],
-        otherFunc = data.func;
+    const data = array[length];
+    const otherFunc = data.func;
     if (otherFunc == null || otherFunc == func) {
       return data.name;
     }