Setting conflicts in config fails

[brejoc]

Building a project which defines conflicts in the config file fails.

Conflicts are defined as a list:

conflicts:
    - foo
    - bar

Command line gets the parameter like this: --conflicts foo bar

The fpm doc say this:

--conflicts CONFLICTS         Other packages/versions this package conflicts with. This flag can specified multiple times.

So this probably should look like this: --conflicts foo --conflicts bar