Make fields of struct Signature public

src/lib.rs

@@ -238,8 +238,8 @@ fn blh(b: &[u8]) -> Vec {
 
 #[derive(Debug, Clone)]
 pub struct Signature {
-    r_b8: Point,
-    s: BigInt,
+    pub r_b8: Point,
+    pub s: BigInt,
 }
 
 impl Signature {