Add type of output to getName function

[dbritto-dev]

No description provided.

[jsoumelidis]

Thank you @danilobrinu for your suggestion, but this extension and the examples should remain compatible with php v5.6 which does not support return types. The newline at the end of file is correct though :)

[dbritto-dev]

@jsoumelidis for PHP 7.2 and more you need the type if not you get and exception. I'm working in a project using PHP 7.2.11.

[jsoumelidis]

You're right. Extension explicitly declares the return type of the function since v7.0.x-dev. So this PR should target branch 7.0.x-dev in order this patch to applied to all 7.x.x-dev and master, of course.

[jsoumelidis]

@danilobrinu please also note that if your projects uses php 7.2.x then you should use the 7.2.x-dev branch of the extension. Branch master targets php 7.3 (soon php 7.4) and won't work for 7.2 'cause of some php internal api changes.

[jsoumelidis]

See #8