fix: error on calling batch with 1 item.

src/lib/tendermint-batch-rpc/batchhttpclient.ts

@@ -2,13 +2,14 @@ import {
   isJsonRpcErrorResponse,
   JsonRpcRequest,
   JsonRpcSuccessResponse,
-  parseJsonRpcResponse,
+  parseJsonRpcResponse
 } from '@cosmjs/json-rpc';
 import {
   HttpClient,
-  HttpEndpoint,
+  HttpEndpoint
 } from '@cosmjs/tendermint-rpc/build/rpcclients';
 import { http } from '@cosmjs/tendermint-rpc/build/rpcclients/httpclient';
+import { orderByFromJSON } from 'cosmjs-types/cosmos/tx/v1beta1/service';
 
 export class BatchHttpClient extends HttpClient {
   protected readonly declare url: string;
@@ -21,7 +22,9 @@ export class BatchHttpClient extends HttpClient {
   public async executeBatch(
     requests: JsonRpcRequest[]
   ): Promise<JsonRpcSuccessResponse[]> {
-    const responses = await http('POST', this.url, this.headers, requests);
+    let responses = await http('POST', this.url, this.headers, requests);
+    if (!(responses instanceof Array)) responses = [responses];
+
     const parsedResponses = [];
     for (const response of responses) {
       const parsedResponse = parseJsonRpcResponse(response);