import { mergeHeaders } from "https://dotland.deno.dev/x/oak@v12.2.0/deps.ts";
Allows merging of various sources of headers into a final set of headers
which can be used in a {@link Response}.
Note, that unlike when passing a Response or {@link Headers} used in a
response to {@link CookieMap} or SecureCookieMap, merging
will not ensure that there are no other Set-Cookie headers from other
sources, it will simply append the various headers together.