Allow with to define any value type

[kenodegard]

Description

The template-files supports a with key in the config file. This with key is the context used to template the given file. Previously the with context only allowed string values. Let's expand it to support any other type.

Example config.yml:

some/repo:
  - src: templates/template.yml
    dst: ...
    with:
      conditional: true

Example template.yml:

{% if conditional %}
- conditional value
{% endif %}