Updated to PHP 7.4 and PHPUnit 9

3.0

added --testdox option to test script

Updated dependencies

Now uses the correct exception names

Now works with arc-base 2

Merge pull request #17 from poef/master

accept arc-base 2 as well

arc-cache code cleanup

Made minor code cleanup changes and documentation updates.

fixed testing, added composer calles for travis

Merge pull request #1 from mjrider/master

improve testing and testability