Fix CLI startup syntax error

[MrDiscipline]

Summary

• fix the startup syntax error in bin/lunkcrypt
• end the first var declaration with a semicolon instead of a comma before the next var

Fixes #1.

Verification

node --check bin/lunkcrypt
node bin/lunkcrypt --help
node bin/lunkcrypt --version

I also packed the branch and installed the tarball into a clean temporary npm project:

npm pack
npm install /path/to/lunkcrypt-1.0.3.tgz
./node_modules/.bin/lunk --help
./node_modules/.bin/lunk --version

Both commands exit 0 after the fix. The currently published lunkcrypt@1.0.3 fails immediately with SyntaxError: Unexpected token 'var'.