Merge pull request #40 from indieweb/fix-travis

remove old php versions and add 7.3 and 7.4

add function to set user agent

include */* in accept header

update coverage report

Merge pull request #26 from aaronpk/master

use Mf2 library to parse rels

Merge pull request #25 from aaronpk/master

adds failing test and fix for #24

Update example.php with new API

Merge pull request #20 from aaronpk/master

update php-mf2 dependency, add tests for relative protocol resolving

follow redirects when searching for the webmention endpoint

fix http response object