fix(forms): getRawValue returns any instead of Object (#12599)

modules/@angular/forms/src/model.ts

@@ -1016,7 +1016,7 @@ export class FormGroup extends AbstractControl {
    * If you'd like to include all values regardless of disabled status, use this method.
    * Otherwise, the `value` property is the best way to get the value of the group.
    */
-  getRawValue(): Object {
+  getRawValue(): any {
     return this._reduceChildren(
         {}, (acc: {[k: string]: AbstractControl}, control: AbstractControl, name: string) => {
           acc[name] = control.value;

tools/public_api_guard/forms/index.d.ts

@@ -269,7 +269,7 @@ export declare class FormGroup extends AbstractControl {
     }, validator?: ValidatorFn, asyncValidator?: AsyncValidatorFn);
     addControl(name: string, control: AbstractControl): void;
     contains(controlName: string): boolean;
-    getRawValue(): Object;
+    getRawValue(): any;
     patchValue(value: {
         [key: string]: any;
     }, {onlySelf, emitEvent}?: {