0.13

• feat: Server.run takes ?after_init parameter

• remove dep on ounit2 and qtest

• expose Response.make_void

• Add OPTIONS method

• use ocamlformat on the code

• fix: SSE requires no body

• fix: get addr/port from the current socket

• fix: missing closing crlf in chunked streams

• fix: module Html was not exposed

• fix: close stream after Response.output

• fix(tiny-httpd-vfs-pack): allow redirections when fetching resources