Commits for 2020-01-08

The following 4 changes have been made on 2020-01-08:

- fixed lastmod dateformat (Author: Mirko De Grandis, Hash: #22e7533)
- sitemaps - missing files (Author: Mirko De Grandis, Hash: #f62df36)
- sitemaps - composer was missing (Author: Mirko De Grandis, Hash: #5b69699)
- added sitemaps support (Author: Mirko De Grandis, Hash: #7afbaf5)

Check it out. More are coming soon!