chore(deps): bump ffigen from 9.0.1 to 20.1.1 in /packages/secure_storage/amplify_secure_storage_dart in the ffigen group across 1 directory

chore(deps): bump ffigen from 9.0.1 to 20.1.1 in /packages/secure_storage/amplify_secure_storage_dart in the ffigen group across 1 directory #68