Added axios.formToJSON method; (#4735)

* Draft

* Added `formDataToJSON` helper;
Added `axios.formToJSON` method;
Added client tests;

Co-authored-by: Jay <jasonsaayman@gmail.com>

lib/utils.js

@@ -441,6 +441,38 @@ var isTypedArray = (function(TypedArray) {
   };
 })(typeof Uint8Array !== 'undefined' && Object.getPrototypeOf(Uint8Array));
 
+function forEachEntry(obj, fn) {
+  var generator = obj && obj[Symbol.iterator];
+
+  var iterator = generator.call(obj);
+
+  var result;
+
+  while ((result = iterator.next()) && !result.done) {
+    var pair = result.value;
+    fn.call(obj, pair[0], pair[1]);
+  }
+}
+
+function matchAll(regExp, str) {
+  var matches;
+  var arr = [];
+
+  while ((matches = regExp.exec(str)) !== null) {
+    arr.push(matches);
+  }
+
+  return arr;
+}
+
+var isHTMLForm = kindOfTest('HTMLFormElement');
+
+var hasOwnProperty = (function resolver(_hasOwnProperty) {
+  return function(obj, prop) {
+    return _hasOwnProperty.call(obj, prop);
+  };
+})(Object.prototype.hasOwnProperty);
+
 module.exports = {
   isArray: isArray,
   isArrayBuffer: isArrayBuffer,
@@ -471,5 +503,9 @@ module.exports = {
   endsWith: endsWith,
   toArray: toArray,
   isTypedArray: isTypedArray,
-  isFileList: isFileList
+  isFileList: isFileList,
+  forEachEntry: forEachEntry,
+  matchAll: matchAll,
+  isHTMLForm: isHTMLForm,
+  hasOwnProperty: hasOwnProperty
 };