Revert "fix: move back to in-build set and remove lodash.set (#685)"

This reverts commit 5754c47.

Author: bluebill1049

src/toNestErrors.ts

@@ -6,55 +6,9 @@ import {
   FieldValues,
   InternalFieldName,
 } from 'react-hook-form';
+import set from 'lodash.set';
 import { validateFieldsNatively } from './validateFieldsNatively';
 
-export const isDateObject = (value: unknown): value is Date => value instanceof Date;
-
-export const isNullOrUndefined = (value: unknown): value is null | undefined => value == null;
-
-export const isObjectType = (value: unknown): value is object =>
-  typeof value === 'object';
-
-export const isObject = <T extends object>(value: unknown): value is T =>
-  !isNullOrUndefined(value) &&
-  !Array.isArray(value) &&
-  isObjectType(value) &&
-  !isDateObject(value);
-
-export const isKey = (value: string) => /^\w*$/.test(value);
-
-const compact = <TValue>(value: TValue[]) =>
-  Array.isArray(value) ? value.filter(Boolean) : [];
-
-const stringToPath = (input: string): string[] =>
-  compact(input.replace(/["|']|\]/g, '').split(/\.|\[/));
-
-const set = (object: FieldValues, path: string, value?: unknown) => {
-  let index = -1;
-  const tempPath = isKey(path) ? [path] : stringToPath(path);
-  const length = tempPath.length;
-  const lastIndex = length - 1;
-
-  while (++index < length) {
-    const key = tempPath[index];
-    let newValue = value;
-
-    if (index !== lastIndex) {
-      const objValue = object[key];
-      newValue =
-        isObject(objValue) || Array.isArray(objValue)
-          ? objValue
-          : !isNaN(+tempPath[index + 1])
-            ? []
-            : {};
-    }
-    object[key] = newValue;
-    object = object[key];
-  }
-  return object;
-};
-
-
 export const toNestErrors = <TFieldValues extends FieldValues>(
   errors: FieldErrors,
   options: ResolverOptions<TFieldValues>,