No GitHub sync for CI builds

[ivanhercaz]

Hi!
I configured my project to report the quality of the docs after the builds of Travis, but it seems something is broken with Inch CI due I still see the "how-to" configure Inch CI for an Elixir project in the master branch (if I select the HEAD branch I see the reports).

For the GitHub sync issue I get an mixed content error due the mix of protocols. The error is:

Mixed Content: The page at 'https://inch-ci.org/github/ivanhercaz' was loaded over HTTPS, but requested an insecure script 'http://inch-ci.org/sync_projects?_=1589202465389'.
This request has been blocked; the content must be served over HTTPS.

It seems there is some opened issues reporting this (#211, #245, #183) and one PR (#212) in which @matoakley proposes a solution. I decided to open a new issue due I am also reporting something that I think it may be a side-effect, or not (the situation I mentioned in the first paragraph).

Thank you for this project, @rrrene. It is very interesting and useful.