chore(submit_package): use unwrap_or_default instead of .unwrap()#159

oleonardolima merged 2 commits intobitcoindevkit:masterbitcoindevkit/rust-esplora-client:masterfrom

oleonardolima:refactor/improve-error-handling-and-remove-unwrapoleonardolima/rust-esplora-client:refactor/improve-error-handling-and-remove-unwrapCopy head branch name to clipboard