Revert to setExpectedException() method

This enables to use the same testing set for <= PHP 5.5 and PHP 5.6 >=. We'll address this in a later stage where the method is entirely removed from phpunit.

tests/PhoneValidatorTest.php

@@ -347,7 +347,7 @@ public function testValidatePhoneLenient()
 
     public function testValidatePhoneFaultyParameters()
     {
-        $this->expectException('Propaganistas\LaravelPhone\Exceptions\InvalidParameterException');
+        $this->setExpectedException('Propaganistas\LaravelPhone\Exceptions\InvalidParameterException');
 
         // Validator with given country, correct type, faulty parameter.
         $this->performValidation([