fix from any json presentation for vp token impl

Signed-off-by: Ryan Tate <[email protected]>

src/core/response/parameters.rs

@@ -98,7 +98,7 @@ impl TryFrom<AnyJsonPresentation> for VpToken {
     type Error = Error;
 
     fn try_from(vp: AnyJsonPresentation) -> Result<Self, Self::Error> {
-        Self::try_from(serde_json::to_value(vp)?)
+        Ok(VpToken::Single(serde_json::to_vec(&vp)?))
     }
 }