test(input):fix failing test on MS Edge

For whatever reason, MS Edge throws during testing, when trying to set the view value to
`9999-12-31T23.59.59`.

Other values I tried (including later dates) didn't throw. I also couldn't reproduce it outside of
the test.

Author: gkalpak

test/ng/directive/inputSpec.js

@@ -1196,7 +1196,7 @@ describe('input', function() {
 
       it('should validate if max is empty', function() {
         $rootScope.maxVal = undefined;
-        $rootScope.value = new Date(9999, 11, 31, 23, 59, 59);
+        $rootScope.value = new Date(3000, 11, 31, 23, 59, 59);
         $rootScope.$digest();
 
         expect($rootScope.form.alias.$error.max).toBeFalsy();