[fix] pushover - Correctly catch and handle RequestException when its Response is None
[fix] pushover - Correctly catch and handle RequestException when its Response is None

malkavi/Flexget,malkavi/Flexget,qk4l/Flexget,malkavi/Flexget,Danfocus/Flexget,jawilson/Flexget,OmgOhnoes/Flexget,LynxyssCZ/Flexget,OmgOhnoes/Flexget,jawilson/Flexget,crawln45/Flexget,crawln45/Flexget,drwyrm/Flexget,drwyrm/Flexget,JorisDeRieck/Flexget,tobinjt/Flexget,jawilson/Flexget,Danfocus/Flexget,poulpito/Flexget,sean797/Flexget,gazpachoking/Flexget,qk4l/Flexget,LynxyssCZ/Flexget,sean797/Flexget,drwyrm/Flexget,Flexget/Flexget,LynxyssCZ/Flexget,JorisDeRieck/Flexget,jacobmetrick/Flexget,qk4l/Flexget,malkavi/Flexget,Flexget/Flexget,poulpito/Flexget,crawln45/Flexget,tobinjt/Flexget,Flexget/Flexget,jacobmetrick/Flexget,OmgOhnoes/Flexget,JorisDeRieck/Flexget,LynxyssCZ/Flexget,sean797/Flexget,tobinjt/Flexget,crawln45/Flexget,ianstalk/Flexget,Danfocus/Flexget,JorisDeRieck/Flexget,gazpachoking/Flexget,tobinjt/Flexget,ianstalk/Flexget,Danfocus/Flexget,poulpito/Flexget,jacobmetrick/Flexget,ianstalk/Flexget,jawilson/Flexget,Flexget/Flexget