fix fishfood build

Author: MarkDuckworth

packages/firestore/package.json

@@ -126,7 +126,11 @@
   "license": "Apache-2.0",
   "files": [
     "dist",
-    "lite/package.json"
+    "lite/package.json",
+    "pipelines/package.json",
+    "pipelines/pipelines.d.ts",
+    "lite/pipelines/package.json",
+    "lite/pipelines/pipelines.d.ts"
   ],
   "dependencies": {
     "@firebase/component": "0.7.0",

packages/firestore/src/remote/datastore.ts

@@ -262,17 +262,20 @@ export async function invokeExecutePipeline(
     executePipelineRequest
   );
 
-  return response
+  const result: PipelineStreamElement[] = [];
+  response
     .filter(proto => !!proto.results)
-    .flatMap(proto => {
+    .forEach(proto => {
       if (proto.results!.length === 0) {
-        return fromPipelineResponse(datastoreImpl.serializer, proto);
+        result.push(fromPipelineResponse(datastoreImpl.serializer, proto));
       } else {
-        return proto.results!.map(result =>
-          fromPipelineResponse(datastoreImpl.serializer, proto, result)
+        return proto.results!.forEach(document =>
+          result.push(fromPipelineResponse(datastoreImpl.serializer, proto, document))
         );
       }
     });
+
+  return result;
 }
 
 export async function invokeRunQueryRpc(