Add Lorca

[melignus]

• github.com repo: (https://github.com/zserge/lorca)
• godoc.org: (https://godoc.org/github.com/zserge/lorca)
• goreportcard.com: (https://goreportcard.com/report/github.com/zserge/lorca)
• coverage service link: (https://travis-ci.org/zserge/lorca)

Make sure that you've checked the boxes below before you submit PR:

• I have added my package in alphabetical order.
• I have an appropriate description with correct grammar.
• I know that this package was not listed before.
• I have added godoc link to the repo and to my pull request.
• I have added coverage service link to the repo and to my pull request.
• I have added goreportcard link to the repo and to my pull request.
• I have read Contribution guidelines, maintainers note and Quality standard.

[cassiobotaro]

Build is ok, but where's the coverage?

[melignus]

Build is ok, but where's the coverage?

I apologize. I was following this example #2507 which uses the passing travis build in place of the coverage link. I will reach out to the lorca maintainer to see if they have a solution.