update PHPUnit
update PHPUnit

 - theseer/tokenizer updated from 1.1.0 to 1.1.2
   See changes: https://github.com/theseer/tokenizer/compare/1.1.0...1.1.2
   Release notes: https://github.com/theseer/tokenizer/releases/tag/1.1.2

 - symfony/polyfill-ctype updated from v1.10.0 to v1.11.0
   See changes: https://github.com/symfony/polyfill-ctype/compare/v1.10.0...v1.11.0
   Release notes: https://github.com/symfony/polyfill-ctype/releases/tag/v1.11.0

 - doctrine/instantiator updated from 1.1.0 to 1.2.0
   See changes: https://github.com/doctrine/instantiator/compare/1.1.0...1.2.0
   Release notes: https://github.com/doctrine/instantiator/releases/tag/1.2.0

 - myclabs/deep-copy updated from 1.8.1 to 1.9.0
   See changes: https://github.com/myclabs/DeepCopy/compare/1.8.1...1.9.0
   Release notes: https://github.com/myclabs/DeepCopy/releases/tag/1.9.0

 - phpunit/phpunit updated from 8.0.4 to 8.1.1
   See changes: https://github.com/sebastianbergmann/phpunit/compare/8.0.4...8.1.1
   Release notes: https://github.com/sebastianbergmann/phpunit/releases/tag/8.1.1

mikey179/bovigo-assert