Update old electron target engine for dependencies (#970)
Update old electron target engine for dependencies (#970)

This fixes dependencies of Hyper that build based on the engine being
used (`nodegit` for example).
whitelynx/hyperterm,ppot/hyper,stefanivic/hyper,rickycodes/hyper,chabou/hyper,MartyGentillon/hyper,KunalKene1797/hyper,MartyGentillon/hyper,ppot/hyper,AlmirKadric/hyperterm,ppot/hyper,martinvd/hyper,spncrgr/hyper,reslaurentii/hyper,wilsontayar/hyper,zeit/hyperterm,derrickpelletier/hyper,zeit/hyper,zeit/hyper,zeit/hyper,AlmirKadric/hyperterm,zeit/hyper,zeit/hyperterm,chabou/hyper,reslaurentii/hyper,chabou/hyper,KunalKene1797/hyper,whitelynx/hyperterm,wilsontayar/hyper,spncrgr/hyper,martinvd/hyper,stefanivic/hyper,derrickpelletier/hyper,rickycodes/hyper