grpc_connection.ts: fix import order to make lint happy

Author: dconeybe

packages/firestore/src/platform/node/grpc_connection.ts

@@ -26,8 +26,8 @@ import { Connection, Stream } from '../../remote/connection';
 import { mapCodeFromRpcCode } from '../../remote/rpc_error';
 import { StreamBridge } from '../../remote/stream_bridge';
 import { hardAssert } from '../../util/assert';
-import { FirestoreError } from '../../util/error';
 import { generateUniqueDebugId } from '../../util/debug_uid';
+import { FirestoreError } from '../../util/error';
 import { logError, logDebug, logWarn } from '../../util/log';
 import { NodeCallback, nodePromise } from '../../util/node_api';
 import { Deferred } from '../../util/promise';