fix(instanceOf): fix output type

Author: jedwards1211

src/index.ts

@@ -173,9 +173,9 @@ export const record = <K extends string | number | symbol, V>(
   value: Type<V>
 ): RecordType<K, V> => new RecordType(key, value)
 
-export const instanceOf = <T extends { new (...args: any[]): any }>(
-  classType: T
-): Type<T> => new InstanceOfType(classType)
+export const instanceOf = <T>(classType: {
+  new (...args: any[]): T
+}): Type<T> => new InstanceOfType(classType)
 
 export const tuple = <T extends Type<any>[]>(
   ...types: T

src/types/InstanceOfType.ts

@@ -3,13 +3,11 @@ import Type from './Type'
 import getErrorMessage from '../getErrorMessage'
 import Validation, { ErrorTuple, IdentifierPath } from '../Validation'
 
-export default class InstanceOfType<
-  T extends { new (...args: any[]): any }
-> extends Type<T> {
+export default class InstanceOfType<T> extends Type<T> {
   typeName = 'InstanceOfType'
-  classType: T
+  classType: { new (...args: any[]): T }
 
-  constructor(classType: T) {
+  constructor(classType: { new (...args: any[]): T }) {
     super()
     this.classType = classType
   }