beefy: update CODEOWNERS
/client/consensus/pow/ @sorpaas
/primitives/consensus/pow/ @sorpaas
+# BEEFY
+/client/beefy/ @acatangiu
+/frame/beefy/ @acatangiu
+/frame/beefy-mmr/ @acatangiu
+/primitives/beefy/ @acatangiu
+
# Contracts
/frame/contracts/ @athei
