👍 Expose missing types

Author: lambdalisue

denops_std/helper/batch.ts

@@ -76,3 +76,5 @@ export async function batch(
   const calls = BatchHelper.getCalls(helper);
   return await denops.batch(...calls);
 }
+
+export type { BatchHelper };

denops_std/mod.ts

@@ -1,6 +1,8 @@
 // Re-export
 export type {
+  BatchError,
   Context,
   Denops,
   Dispatcher,
+  Meta,
 } from "./vendor/https/deno.land/x/denops_core/mod.ts";