Update mailmap

.mailmap

@@ -2,4 +2,5 @@ Marcin Krzyzanowski <marcin.krzyzanowski@gmail.com> <758033+krzyzanowskim@users.
 Marcin Krzyzanowski <marcin.krzyzanowski@gmail.com> <krzyzanowskim@users.noreply.github.com>
 Marcin Krzyzanowski <marcin.krzyzanowski@gmail.com> <marcin@krzyzanowskim.com>
 Marcin Krzyzanowski <marcin.krzyzanowski@gmail.com> <marcin.krzyzanowski@gmail.com>
-Luis Reisewitz <reisewitz@me.com> <zweigraf@users.noreply.github.com>
+Luis Reisewitz <reisewitz@me.com> <zweigraf@users.noreply.github.com>
+Nathan Fallet <contact@nathanfallet.me> <nathan.fallet@gmail.com>

CONTRIBUTORS.txt

@@ -76,7 +76,6 @@ organizations who have contributed source code to CryptoSwift.
 - Mo Ramezanpoor <me@mohsenr.com>
 - Nate West <nwest@detroitlabs.com>
 - Nathan Fallet <contact@nathanfallet.me>
-- Nathan Fallet <nathan.fallet@gmail.com>
 - Nicholas Maccharoli <nicko@screaming-cactus.com>
 - Nobutaka Yuasa <nobutaka.yuasa@gmail.com>
 - Oscar De Moya <oscar.demoya@koombea.com>