Update credits

Add all new authors since the last update.
From the git history:
git log --format="%aN" fcb3a3f8f08eddb20252a19a3f8bbbd52bc17c1d..HEAD | sort -u

CREDITS.md

@@ -24,6 +24,7 @@
 * Eric Tsau
 * Erik Beran
 * F-Secure Corporation
+* feneuilflo
 * Fernando G. Aranda
 * Grahack
 * grenclave