Add the Basaa language (bas)

Requested at
https://translatewiki.net/wiki/Thread:Talk:Support/Ajouter_la_langue_bassa%27a

Autonym according to
Hyman, Larry M. (2003). "Basaá (A.43)".
In Nurse, Derek; Philippson, Gérard (eds.).
The Bantu Languages. Routledge. pp. 257–282.

data/langdb.yaml

@@ -58,6 +58,7 @@ languages:
  # For support in webfonts.
   ban-bali: [Bali, [AS, PA], ᬩᬮᬶ]
   bar: [Latn, [EU], Boarisch]
+  bas: [Latn, [AF], ɓasaá]
   bat-smg: [sgs]
   bbc-latn: [Latn, [AS], Batak Toba]
   bbc-batk: [Batk, [AS], ᯅᯖᯂ᯲ ᯖᯬᯅ]