Create type definition for 'nested-property' (#4004)

* Create type definition for 'nested-property'

* Follow lint

src/@types/nested-property.d.ts

@@ -0,0 +1,19 @@
+declare module 'nested-property' {
+	interface IHasNestedPropertyOptions {
+		own?: boolean;
+	}
+
+	interface IIsInNestedPropertyOptions {
+		validPath?: boolean;
+	}
+
+	export function set<T>(object: T, property: string, value: any): T;
+
+	export function get(object: object, property: string): any;
+
+	export function has(object: object, property: string, options?: IHasNestedPropertyOptions): boolean;
+
+	export function hasOwn(object: object, property: string, options?: IHasNestedPropertyOptions): boolean;
+
+	export function isIn(object: object, property: string, objectInPath: object, options?: IIsInNestedPropertyOptions): boolean;
+}