Fix: do not throw when `shellArgs` is not present in `.hyperterm.js` (#678)
Fix: do not throw when `shellArgs` is not present in `.hyperterm.js` (#678)

See https://github.com/zeit/hyperterm/commit/dfcb0a9629c5624847d7f852188254b322e7de82#commitcomment-18834267
zeit/hyperterm,AlmirKadric/hyperterm,ekmartin/hyperterm,zeit/hyper,MartyGentillon/hyper,spncrgr/hyper,stefanivic/hyper,zeit/hyper,chabou/hyper,rickycodes/hyper,reslaurentii/hyper,chabou/hyper,AlmirKadric/hyperterm,wilsontayar/hyper,MartyGentillon/hyper,KunalKene1797/hyper,zeit/hyperterm,ppot/hyper,wilsontayar/hyper,ppot/hyper,whitelynx/hyperterm,chabou/hyper,ekmartin/hyperterm,martinvd/hyper,KunalKene1797/hyper,zeit/hyper,reslaurentii/hyper,spncrgr/hyper,whitelynx/hyperterm,martinvd/hyper,derrickpelletier/hyper,ppot/hyper,stefanivic/hyper,zeit/hyper,derrickpelletier/hyper,rickycodes/hyper