Default shell args not compatible with most shells

• [x ] I am on the latest Hyper.app version
• [x ] I have searched the issues of this repo and believe that this is not a duplicate

• OS version and name: Ubuntu 18.04 Bionic Beaver
• Hyper.app version:
• Link of a Gist with the contents of your .hyper.js: 2.0.0 Stable
• Relevant information from devtools (CMD+ALT+I on macOS, CTRL+SHIFT+I elsewhere): N/A
• The issue is reproducible in vanilla Hyper.app: Is Vanilla

Issue

Other than Bash and Fish, most shells don't support the long form "--login" and only support "-l". These include Tcsh/Csh, Ksh, Zsh, and Dash.

I noticed this when trying to debug Hyper crashing immediately after it launches. I had to put a break point at sesssion.js:68 to see that Dash exited with the error "/bin/sh: 0: Illegal option --" every time.

Changing the default shell args to use "-l" instead of "--login" would make Hyper more compatible with shells out of the box.

Start at app/session.js:68, where the shell arguments are assembled, and reproduce the failure with Dash or another shell named in the issue. Check the default argument handling across Bash, Fish, Tcsh/Csh, Ksh, Zsh, and Dash; done means Hyper launches without the reported illegal-option error.