Cannot reassign a `const`

[bosscube]

There are a couple places I see where a const is reassigned - it should be a let instead.

Example:

cloudflare-cors-anywhere/index.js

Lines 121 to 122 in 6925031

	const responseHeaders = new Headers();
	responseHeaders = setupCORSHeaders(responseHeaders);

Or better yet:

const responseHeaders = setupCORSHeaders(new Headers());