Feature: Support parsing
additional records from DNS response.
(#123 by @clue)
Feature: Support dumping records as part of outgoing binary DNS message.
(#124 by @clue)
Feature: Forward compatibility with upcoming Cache v0.6 and Cache v1.0
(#121 by @clue)
Improve test suite to add forward compatibility with PHPUnit 7,
test against PHP 7.3 and use legacy PHPUnit 5 on legacy HHVM.
(#122 by @clue)