fix -e and -k switches issues

What's Changed

• termux by @Ptechgithub in #1
• new: add error output for better integration, Fix bug when invalid license is entered by @hiddify-com in #2

New Contributors

• @Ptechgithub made their first contribution in #1
• @hiddify-com made their first contribution in #2

Full Changelog: v0.0.2-alpha...v0.0.3-alpha