Merge pull request #149 from Clikengo/master

fix build with API 620

Author: Vincent Rouillé

foundationdb-gen/src/lib.rs

@@ -307,6 +307,9 @@ impl From<Vec<OwnedAttribute>> for FdbOption {
                     "false" => opt.hidden = false,
                     _ => panic!("unexpected boolean value: {}", v),
                 },
+                "defaultFor" | "persistent" => {
+                    // API 620+
+                }
                 attr => {
                     panic!("unexpected option attribute: {}", attr);
                 }