Use base 10 for better debuggability

Author: eps1lon

packages/react-client/src/ReactFlightClient.js

@@ -566,7 +566,7 @@ export function parseModelString(
       }
       case 'n': {
         // BigInt
-        return BigInt('0x' + value.substring(2));
+        return BigInt(value.substring(2));
       }
       default: {
         // We assume that anything else is a reference ID.

packages/react-client/src/ReactFlightReplyClient.js

@@ -76,7 +76,7 @@ function serializeUndefined(): string {
 }
 
 function serializeBigInt(n: bigint): string {
-  return '$n' + n.toString(16);
+  return '$n' + n.toString(10);
 }
 
 function escapeStringValue(value: string): string {

packages/react-server/src/ReactFlightReplyServer.js

@@ -404,7 +404,7 @@ function parseModelString(
       }
       case 'n': {
         // BigInt
-        return BigInt('0x' + value.substring(2));
+        return BigInt(value.substring(2));
       }
       default: {
         // We assume that anything else is a reference ID.

packages/react-server/src/ReactFlightServer.js

@@ -554,7 +554,7 @@ function serializeUndefined(): string {
 }
 
 function serializeBigInt(n: bigint): string {
-  return '$n' + n.toString(16);
+  return '$n' + n.toString(10);
 }
 
 function serializeClientReference(