Support for loose request headers validation

[earllapura]

The package already has validation for request headers. However, it checks for request headers in a strict manner:

function isEqual(a, b) {
  return deepEqual(a, b, { strict: true });
}
// ...
function isRequestHeadersMatching(requestHeaders, required) {
  if (required === undefined) return true;
  return isEqual(requestHeaders, required);
}

Is there any way to make it loose like having a configuration to allow contains or some operation equivalent to that? Thank you!

[andrewnottaviano]

Additionally, it would be nice if there was some documentation and code examples around request headers to make it clear how we should consume it.