Add info for PHPUnit 9

Merge pull request paratestphp#410 from flug/update-symfony-5-components

update of components to symfony 5

Merge pull request paratestphp#411 from Fedcomp/issue-352-multiple-er…

…ror-reports-with-system-out

Support multiple TestCase error reports with system out

Fix .phar deployment

Fix upload location in .travis.yml.

Merge pull request paratestphp#373 from paratestphp/andreasschroth-pa…

…tch-1

Update README.md with new version information

Merge pull request paratestphp#363 from paslandau/wrapper-runner-log

Logfiles for WrapperRunner

Fix .travis.yml (Phar generation).

Merge pull request paratestphp#313 from carusogabriel/assertions

Use dedicated PHPUnit assertions

Merge pull request paratestphp#287 from chaplean/master

Add support for phpdbg, fixes paratestphp#277

bump version

related to paratestphp#257