ReflectionType::__toString() is deprecated in PHP 7.4

[slt]

PHPUnit throws deprecation errors when Phake uses this method in PHP 7.4

ErrorException: Function ReflectionType::__toString() is deprecated

This patch replaces the instances of (string)$returnType with $returnType->getName(); allowing Phake to work on PHP 7.4 without deprecation warnings/errors.

Resolves issue #279

[slt]

PHP 7.4.0 has been released

[jraubswitch]

@bfeaver, @mlively: can This be merged please?

[bfeaver]

I’ll take a look at it tonight.

[bfeaver]

Released and tagged v3.1.7.

[jraubswitch]

Unsilenced deprecation notices (1324) is now gone.. Thanks!

[bfeaver]

Seems I jumped the gun on releasing 3.1.7 without realizing that the new method required a higher version of PHP than we currently required (needs to be >=7.1). I'm tempted to remove the v3.1.7 release and instead tag a v3.2.0. Because 3.1.7 is broken for anyone not on 7.1 or higher, I really don't want to leave it around.

An alternative would be to rollback this change in the 3.1 releases and instead tag a 3.1.8 that would be identical to 3.1.6. The 3.2 release would then be the fix for PHP 7.4 deprecations.

See: #282

[jraubswitch]

Sounds like a good idea to me.. 3.1.x works for php >= 7.0 and 3.2.x works for php >= 7.1
So remove the 3.1.7 and add the 3.1.8 and 3.2.0 respectively.