Add rss.xml to layouts/_default (#316)

Utkarsh Gupta

28.26.2020 e89ad7bd49c4e6da0a017a51b29573e456926def

 theme.toml

@@ -19,7 +19,7 @@
  "single-column",
  "syntax-highlighting"
]
min_version = "0.54"
min_version = "0.57"

[author]
  name = "Luiz F. A. de Prá"