Unicity-Forward-Headers

About

Forwards the following headers:
``javascript
[
'x-request-uuid',
'x-request-release',

// Envoy Headers
'x-ot-span-context',
'x-request-id',

// Zipkin Headers
'x-b3-traceid',
'x-b3-spanid',
'x-b3-parentspanid',
'x-b3-sampled',

// Jaeger Headers
'x-b3-flags'
]
`

Whats new?

#### 1.0.3
Breaking changes, unicity-forward-headers now expects the headers object directly and not request or response objects.
Also made it lowercase incoming headers to ensure dupliates are handled correctly.

Example

`javascript
const ForwardHeaders = require('unicity-forward-headers');

response.headers = ForwardHeaders(request.headers, response.headers);
`
`javascript
const ForwardHeaders = require('unicity-forward-headers');

response.headers = ForwardHeaders(request.headers);
``