Update to version 1.1.0
    
    - Adds support for handling modulemd-defaults YAML documents
    - Adds peek()/dup() routines to all object properties
    - Adds Modulemd.Module.dup_nsvc() to retrieve the canonical form of the unique module identifier.
    - Adds support for boolean types in the XMD section
    
    Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>