Unhandled exception (2d426873)

Zeus version:
`1.5.2.21b875`

Firefox version:
`(52, 0)`

Geckodriver version:
`geckodriver-v0.17.0-linux64.tar.gz`

Error info:
```Traceback (most recent call last):
File "/root/crack/Zeus-Scanner/zeus-scanner/var/search/selenium_search.py", line 268, in parse_search_results
tor=tor, batch=batch, xforward=forward_for
File "/root/crack/Zeus-Scanner/zeus-scanner/var/search/selenium_search.py", line 80, in get_urls
ff_display = Display(visible=0, size=(800, 600))
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/display.py", line 34, in __init__
self._obj = self.display_class(
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/display.py", line 52, in display_class
cls.check_installed()
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/xvfb.py", line 38, in check_installed
ubuntu_package=PACKAGE).check_installed()
TypeError: __init__() got an unexpected keyword argument 'url'
```

Running details:
`Linux-4.15.0-66-generic-x86_64-with-Ubuntu-18.04-bionic`

Commands used:
`zeus.py -dork-list = /root/crack/Zeus-Scanner/zeus-scanner/dork1.txt`

Log file info:
```2020-05-09 19:04:23,666;zeus-log;INFO;log file being saved to '/root/crack/Zeus-Scanner/zeus-scanner/log/zeus-log-3.log'
2020-05-09 19:04:23,668;zeus-log;INFO;using default search engine
2020-05-09 19:04:23,669;zeus-log;INFO;starting dork scan with query 'ork-list'
2020-05-09 19:04:23,670;zeus-log;WARNING;will not parse webcache URL's (to parse webcache pass -W)
2020-05-09 19:04:23,671;zeus-log;WARNING;only pulling URLs with GET(query) parameters (to pull all URL's pass -E)
2020-05-09 19:04:23,672;zeus-log;INFO;attempting to gather query URL
2020-05-09 19:04:23,674;zeus-log;INFO;setting up virtual display to hide the browser
2020-05-09 19:04:23,675;zeus-log;ERROR;selenium_search.pyc failed to gather the URL from search engine, caught exception '__init__() got an unexpected keyword argument 'url'' exception has been logged to current log file
Traceback (most recent call last):
File "/root/crack/Zeus-Scanner/zeus-scanner/var/search/selenium_search.py", line 268, in parse_search_results
tor=tor, batch=batch, xforward=forward_for
File "/root/crack/Zeus-Scanner/zeus-scanner/var/search/selenium_search.py", line 80, in get_urls
ff_display = Display(visible=0, size=(800, 600))
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/display.py", line 34, in __init__
self._obj = self.display_class(
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/display.py", line 52, in display_class
cls.check_installed()
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/xvfb.py", line 38, in check_installed
ubuntu_package=PACKAGE).check_installed()
TypeError: __init__() got an unexpected keyword argument 'url'

2020-05-09 19:04:33,507;zeus-log;INFO;Zeus got an unexpected error and will automatically create an issue for this error, please wait
2020-05-09 19:04:33,509;zeus-log;INFO;getting authorization
2020-05-09 19:04:33,510;zeus-log;INFO;extracting traceback from log file
2020-05-09 19:04:33,511;zeus-log;INFO;attempting to get firefox browser version
```

Start with var/search/selenium_search.py, especially get_urls around line 80 and parse_search_results around line 268, then reproduce the reported command on the listed Ubuntu environment. Confirm the pyvirtualdisplay TypeError and determine what change is needed for the scan to gather URLs without the exception.

Written by the indexing model from the issue text.