fix: convert RelLockTime to numeric value in serialization

Change RelLockTime serialization to output numeric value instead of string

Issue: BTC-1829

Author: OttoAllmendinger

packages/wasm-miniscript/src/try_into_js_value.rs

@@ -92,7 +92,7 @@ impl TryIntoJsValue for AbsLockTime {
 
 impl TryIntoJsValue for RelLockTime {
     fn try_to_js_value(&self) -> Result<JsValue, JsError> {
-        Ok(JsValue::from_str(&self.to_string()))
+        Ok(JsValue::from_f64(self.to_consensus_u32() as f64))
     }
 }
 

packages/wasm-miniscript/test/fixtures/56.json

@@ -30,7 +30,7 @@
                   {
                     "ZeroNotEqual": {
                       "Older": {
-                        "relLockTime": "2"
+                        "relLockTime": 2
                       }
                     }
                   },
@@ -61,7 +61,7 @@
                 ]
               },
               {
-                "n:older": "2"
+                "n:older": 2
               }
             ]
           }

packages/wasm-miniscript/test/fixtures/57.json

@@ -30,7 +30,7 @@
                   {
                     "ZeroNotEqual": {
                       "Older": {
-                        "relLockTime": "2"
+                        "relLockTime": 2
                       }
                     }
                   },
@@ -61,7 +61,7 @@
                 ]
               },
               {
-                "n:older": "2"
+                "n:older": 2
               }
             ]
           }