Add new version (3.1.21) of ArangoDB

library/arangodb

@@ -5,6 +5,6 @@
 2.8.11: git://github.com/arangodb/arangodb-docker@05366cb4c6a6aab8e1ff9ca74c81b09d9a57b5b5 jessie/2.8.11
 
 
-3.1: git://github.com/arangodb/arangodb-docker@d930b191a1867cb4ab853fe37c9cf7fdfc64dbc1 jessie/3.1.20
-3.1.20: git://github.com/arangodb/arangodb-docker@d930b191a1867cb4ab853fe37c9cf7fdfc64dbc1 jessie/3.1.20
-latest: git://github.com/arangodb/arangodb-docker@d930b191a1867cb4ab853fe37c9cf7fdfc64dbc1 jessie/3.1.20
+3.1: git://github.com/arangodb/arangodb-docker@3f34ce3522ece639f0d01968934f0a191a7ba2a4 jessie/3.1.21
+3.1.21: git://github.com/arangodb/arangodb-docker@3f34ce3522ece639f0d01968934f0a191a7ba2a4 jessie/3.1.21
+latest: git://github.com/arangodb/arangodb-docker@3f34ce3522ece639f0d01968934f0a191a7ba2a4 jessie/3.1.21