Windows can't open this file when composer.phar is found

[tomzx]

Question	Answer
Infection version	0.7.1
Test Framework version	PHPUnit
PHP version	7.2.1
Platform	Windows
Github Repo	-

In \Infection\Finder\TestFrameworkExecutableFinder::addVendorFolderToPath, if $this->findComposer() returns the path to a phar file, Windows shows a window asking the user to select which program to use to open the file.

The expected behavior is that it should execute the phar file by calling the php binary since Windows ignores the shebang within the phar file.

It looks like logic from \Infection\Finder\TestFrameworkExecutableFinder::makeExecutable could be reused in order to prefix the phar file with the appropriate php binary.

[sidz]

Good catch 👍 will be covered by #185

[sidz]

Fix has been merged.
@tomzx 🚢