fix: adds missing dependency errlop

[oliverlorenz]

I have found that I get an error when running npx projectz compile.

$ npx projectz compile
npx: installed 20 in 2.95s
Cannot find module 'errlop
Require stack:
- /home/elorenz/.npm/_npx/14622/lib/node_modules/projectz/edition-es2019/index.js
- /home/elorenz/.npm/_npx/14622/lib/node_modules/projectz/edition-es2019/bin.js
- /home/elorence/.npm/_npx/14622/lib/node_modules/projectz/bin.js

After some analysis I noticed that errlop as dependency is missing to work properly.

This PR adds this dependency. I would be happy if you could add this! Thanks for the project!

[balupton]

releasing in a few minutes

[balupton]

releasing now https://travis-ci.com/github/bevry/projectz/builds/172897649