publicly expose Btc types

pegin handling code needs to touch bitcoin and elements types at the
same time so it's handy having this exposed

Author: RCasatta

src/lib.rs

@@ -113,7 +113,7 @@ use bitcoin_miniscript::policy::semantic::Policy as BtcPolicy;
 use bitcoin_miniscript::policy::Liftable as BtcLiftable;
 // re-export imports
 pub use bitcoin_miniscript::{hash256, ForEachKey, MiniscriptKey, SigType, ToPublicKey};
-use bitcoin_miniscript::{
+pub use bitcoin_miniscript::{
     Descriptor as BtcDescriptor, Error as BtcError, Miniscript as BtcMiniscript,
     Satisfier as BtcSatisfier, Segwitv0 as BtcSegwitv0, Terminal as BtcTerminal,
 };