Support stubbing methods returning a reference

Merge pull request #50 from facile-it/feature/reference

Support methods returning a reference

Support PHP 7.4

Merge pull request #49 from facile-it/feature/php74

PHP 7.4 support

Support PHPUnit 7

Merge pull request #44 from facile-it/feature/phpunit7

PhpUnit 7 integration and drop support for php70

Support PHPUnit 6.5

Merge pull request #43 from facile-it/feature/phpunit65

Support PHPUnit 6.5

Cleanup directory structure

Merge pull request #42 from facile-it/cleanup

Do some routine cleanup

Use random_int instead of mt_rand

Replaced the mt_rand function with random_int when generating the proxy class name.

Refactor public test case

Merge pull request #39 from facile-it/feature/public-tests

Refactor public tests

Fix property stubs

Merge pull request #38 from facile-it/hotfix/properties-stub

Fix property stubs

Whole new refactor and lots of goodies

• Make Proxy extend the actual mock object
• Add function moka() to replace the homonym method
• Support property stubs

Replace traits with function moka()

v2.0.0-alpha5

Fix tests and improve code quality