Member has private access

[Gummibeer]

• FACT-Finder PHP Library version: 1.2.5+src
• PHP version: PHP 7.0.25
• Expected behavior: No error cause of access violation.
• Actual behavior: Try to access private property from extended class.
• Steps to reproduce:
  \FACTFinder\Core\IConvEncodingConverter and \FACTFinder\Core\Utf8EncodingConverter try to access private property \FACTFinder\Core\AbstractEncodingConverter::$log.