import argon2-cffi module from concepts

Author: Lordfirespeed

python/ql/lib/experimental/cryptography/Concepts.qll

@@ -4,3 +4,5 @@ import semmle.python.ApiGraphs
 import experimental.cryptography.modules.stdlib.HashlibModule as HashLibModule
 import experimental.cryptography.modules.stdlib.HmacModule as HMacModule
 import experimental.cryptography.modules.CryptographyModule as CryptographyModule
+// contents are wrapped in a module, so 'as' not needed
+import experimental.cryptography.modules.Argon2CffiModule