substrate upgrade: export StakerStatus

src/lib.rs

@@ -51,6 +51,7 @@ pub use balances::Call as BalancesCall;
 pub use runtime_primitives::{Permill, Perbill};
 pub use timestamp::BlockPeriod;
 pub use srml_support::{StorageValue, construct_runtime};
+pub use staking::StakerStatus;
 
 /// The type that is used for identifying authorities.
 pub type AuthorityId = <AuthoritySignature as Verify>::Signer;