Use puppet 3.7

Mainly in order to exclude file in the build.

Extract from documentation:

It’s not unusual to have some files in your module that you want to
exclude from your build. You may exclude files by including them in
.gitgnore or .pmtignore. To be read during the build process, your
.pmtignore or .gitignore file must be in the module’s root directory.
If you have both a .pmtignore and a .gitignore file, the puppet module
tool will read the .pmtignore file over the .gitignore.