Fix PHP 8.1 Deprecation

PHP 8.1 throws the error "PHP Deprecated: Redis::connect(): Passing null to parameter #2 ($port)...

Update doctrine cache package

Update doctrine cache fork in composer

Use custom fork of doctrine/cache with actual packagist package.

use custom doctrine cache fork

Updates composer dependencies

Use \PHPUnit\Framework\TestCase instead of \PHPUnit_Framework_TestCase

Catch a parse error in case cache file does not get written correctly

Test enhancement

Added a decorator for setting a default timeout, and a decorator for setting a key prefix

Added KeyPrefixTest.php

Removes unneeded files from package

Avoids getting a message like this in the UI:

`syntax error, unexpected '=>' (T_DOUBLE_ARROW)...

Improve fetching cache from chained backend

While profiling a production server noticed during a tracking request which takes like 50ms we s...

Make File::getFilename() public and return correct value in File::doFlush().

Rename Piwik -> Matomo

Fixes Build for HHVM + Run tests on PHP 7

Travis: Use trusty build infrastructure

Allow to use unix socket for redis backend

Use our own, faster arrayCache, compat for Piwik 3

Fix a possible endless loop, and a possible seg fault

we'll need to remember to update these when increasing PHP version: refs https://github.com/piwik...

https://github.com/doctrine/cache/commit/17d710dba72e9f91c9b6c56afe12ce3863d7d5be#diff-06cf1d6e08...

* trigger a build to check if it passes on PHP 5.3

it's currently failing our UI tests: http...

Fixing parameter

refs #5 Make Transient cache faster