Fix memory leak in dev server

dist/functions/bundler/dispose-bundler-contexts.d.ts

@@ -0,0 +1,6 @@
+/**
+ * Disposes the hydration and SSR esbuild contexts, releasing the incremental
+ * build state esbuild keeps in memory for them. The bundlers re-create the
+ * contexts on their next run.
+ */
+export default function disposeBundlerContexts(): Promise<void>;