Merge pull request memio#8 from roukmoute/php7.2

Add support for PHP 7.2

Merge pull request memio#6 from aRn0D/issue_5

Fix memio#5 Do not add "use float"

Merge pull request memio#4 from aRn0D/fixphpspecversion

Fix phpspec version

Merge pull request memio#3 from aRn0D/update_dependencies

Update memio dependencies

phpspec 4

Upgraded phpspec to v4.0@rc, meaning:

* phpspec v2 and v3 support was dropped

Scalar Type Hints

Upgraded Memio to v2.0@alpha, meaning:

* PHP 5 support was dropped
* scalar arguments now get type hinted
* maximum method argument line length changed from 120 to 80
* opening curly brace changed to be on the same line as the method
  closing parenthesis, when arguments are on many lines
* properties changed to not have empty lines between them,
  except if they have PHPdoc

Re-enabled Constructor Generator

Constructor generator wasn't registered as a generator in phpspec 3,
du to a missing DI tag.

Fixed ugrade

Released v0.6.0

Upgraded to phpspec 3

Due to phpspec sharing some common dependencies with SpecGen:

* dropped support for PHP < 5.6
* dropped support for Symfony Event Dispatcher < 2.7