Returns a new record with all entries of the given record except the ones that have a key that does not match the given predicate

Example:

import { filterKeys } from "https://deno.land/std@0.131.0/collections/mod.ts";
import { assertEquals } from "https://deno.land/std@0.131.0/testing/asserts.ts";

const menu = {
    'Salad': 11,
    'Soup': 8,
    'Pasta': 13,
}
const menuWithoutSalad = filterKeys(menu, it => it !== 'Salad')

assertEquals(menuWithoutSalad, {
    'Soup': 8,
    'Pasta': 13,
})