Merge #521: Make checksum pub

1e30000 Make checksum pub (sanket1729)

Pull request description:

ACKs for top commit:
  apoelstra:
    ACK 1e30000

Tree-SHA512: 4787a26cb27933362d502d343abb893fcee91d79a797cbecb52599174b85f25dc293aef84071c49cbb44c5d6ec97af85e286871bf0166dccbb87b5cef04c3f16

Author: apoelstra

src/descriptor/mod.rs

@@ -43,7 +43,7 @@ pub use self::sh::{Sh, ShInner};
 pub use self::sortedmulti::SortedMultiVec;
 pub use self::tr::{TapTree, Tr};
 
-mod checksum;
+pub mod checksum;
 mod key;
 
 pub use self::key::{