Compatibility with Magento 2.3.0

[cscd98]

bin/magento setup:di:compile

Compilation was started.
Repositories code generation... 1/7 [====>-----------------------]  14% < 1 sec 78.0 MiB
In ErrorHandler.php line 61:
                                                                                                                                                                                                           
  Warning: Declaration of Webgriffe\BootstrapMenu\Block\Html\Topmenu::_getHtml(Magento\Framework\Data\Tree\Node $menuTree, $childrenWrapClass, $limit, $colBrakes = Array) should be compatible with Mage  
  nto\Theme\Block\Html\Topmenu::_getHtml(Magento\Framework\Data\Tree\Node $menuTree, $childrenWrapClass, $limit, array $colBrakes = Array) in /home/ccarnell/Sites/vax-uk2/vendor/webgriffe/module-bootst  
  rap-menu/Block/Html/Topmenu.php on line 130                                                                                                                                                              
                                                                                                                                                                                                           

[cscd98]

#10

This will fix this.

[mmenozzi]

Thank you! PR merged!