message: [json-rpc] rename in methods.rs _parse_signed_trasaction to parse_signed_transaction
  Closes:
diff: @@ -155,14 +155,14 @@ impl JsonRpcRequest {
  Ok(EventKey::try_from(&hex::decode(raw)?[..])?)
  }
  - fn _parse_signed_trasaction(&self, val: Value) -> Result<SignedTransaction> {
  + fn _parse_signed_transaction(&self, val: Value) -> Result<SignedTransaction> {
  let raw: String = serde_json::from_value(val)?;
  Ok(lcs::from_bytes(&hex::decode(raw)?)?)
  }
  fn parse_signed_transaction(&self, index: usize, name: &str) -> Result<SignedTransaction> {
  Ok(self
  - ._parse_signed_trasaction(self.get_param(index))
  + ._parse_signed_transaction(self.get_param(index))
  .map_err(|_| invalid_param(index, name))?)
  }
  