v4.1.1

Fixes #60

Add -v argument to support single variables cross platform

#57

Allow combining `-e` and `-c`

Allow to combine -e and -c, see #44 for more details

Add help

• feat: Add help if you run command wrong
• fix: Print empty string if variable not set instead of undefined

v3.0.0

Since we updated some dependencies (f7b3dc5), this might break on some systems

Especially cross-spawn might not be compatible with your node version (https://github.com/moxystudio/node-cross-spawn/blob/master/CHANGELOG.md)