use "error" when type is Error

This renames "err" to "error" when the type is Error for consistency
(fixes redux complaints about non-serializable err).

src/lwp3-bootloader/actions.ts

@@ -63,10 +63,10 @@ function didFailToConnectCreator(
 
 function didFailToConnectCreator(
     reason: BootloaderConnectionFailureReason.Unknown,
-    err: Error,
+    error: Error,
 ): Action<typeof didFailToConnectType> & {
     reason: BootloaderConnectionFailureReason.Unknown;
-    err: Error;
+    error: Error;
 };
 
 function didFailToConnectCreator<T extends BootloaderConnectionFailureReason>(
@@ -103,9 +103,9 @@ export const didFailToConnect = createAction(didFailToConnectCreator);
 /**
  * There was a connection error.
  */
-export const didError = createAction((err: Error) => ({
+export const didError = createAction((error: Error) => ({
     type: 'bootloader.action.connection.didError',
-    err,
+    error,
 }));
 
 /**
@@ -127,9 +127,9 @@ export const didSend = createAction(() => ({
 /**
  * Sending a message failed with error.
  */
-export const didFailToSend = createAction((err: Error) => ({
+export const didFailToSend = createAction((error: Error) => ({
     type: 'bootloader.action.connection.didFailToSend',
-    err,
+    error,
 }));
 
 /**
@@ -249,12 +249,12 @@ export const didRequest = createAction((id: number) => ({
 /**
  * Creates an action that indicates a request failed to send.
  * @param id The unique identifier of the action.
- * @param err The error message.
+ * @param error The error message.
  */
-export const didFailToRequest = createAction((id: number, err: Error) => ({
+export const didFailToRequest = createAction((id: number, error: Error) => ({
     type: 'bootloader.action.didFailToRequest',
     id,
-    err,
+    error,
 }));
 
 // Bootloader response actions for receiving responses from the connection.

src/lwp3-bootloader/sagas.ts

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-// Copyright (c) 2020,2022 The Pybricks Authors
+// Copyright (c) 2020-2022 The Pybricks Authors
 //
 // Handles LEGO Wireless Protocol v3 Bootloader protocol.
 
@@ -121,7 +121,7 @@ function* encodeRequest(): Generator {
         });
 
         if (failedToSend) {
-            yield* put(didFailToRequest(action.id, failedToSend.err));
+            yield* put(didFailToRequest(action.id, failedToSend.error));
         } else {
             yield* put(didRequest(action.id));
         }