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

Author: bluebill1049

src/toNestErrors.ts

@@ -6,9 +6,55 @@ 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>,