Expose styled and produce

Summary: To control bundle size and the amount of different versions used, we want plugins to use emotion's styled and immer's produce from flipper-plugin, rather than bringing their own

Reviewed By: passy

Differential Revision: D25087286

fbshipit-source-id: d2cc8b2cb1a17c520d05d99048cd94338984a913

desktop/plugins/seamammals/src/index.tsx

@@ -16,8 +16,9 @@ import {
   createState,
   useValue,
   theme,
+  styled,
 } from 'flipper-plugin';
-import {ManagedDataInspector, DetailSidebar, styled} from 'flipper';
+import {ManagedDataInspector, DetailSidebar} from 'flipper';
 
 type Row = {
   id: number;