Fix trailing characters in doc snippets (#63)

It makes it's not convenient to copy/paste those

Fix: PHP 7.4 cli logs in stderr (#55)

* tests: simulating the situation of PHP 7.4 stderr output

* fix: patch to clean stderr output based on the keywords

* chore: adding PHP 7.4 to travis

* fix: forgot to wipe the error output after the test

Build for more PHP versions, bump to 7.1

Upgrade PHPUnit and PHP

Fix compatibility with newer Symfony versions

Make sure latest version works on both PHP 5.6 and 7 (#42)

* Remove PHP 7 dependency.

* Fix dependencies.

* Revert "PHPUnit 6"

This reverts commit 6c01f56.

* Fix Composer versions and revert commit.

* Fix PHPUnit version.

* Fix fatal error tests for both PHP 7 and 5.6.

* Revert "Revert "PHPUnit 6""

This reverts commit 05d95cf.

* Fix tests.

* Revert "Fix tests."

This reverts commit 5dda0a9.

* Revert "Revert "Revert "PHPUnit 6"""

This reverts commit 072b6bb.

* Revert "Revert "Revert "Revert "PHPUnit 6""""

This reverts commit 62230ac.

* Revert "Revert "Fix tests.""

This reverts commit c0a5a04.

* Allow both PHPUnit 5 and 6.

* Restore tests for PHP7 and fix dev dependencies.

* Update HttpMockMultiPHPUnitIntegrationTest.php

Use custom phpunit

Increase phpunit version requirements

CS

Move server docs