fix(react-query-devtools): only export devtools in development mode

add env check for cjs builds

Author: TkDodo

packages/react-query-devtools/src/index.ts

@@ -1 +1,15 @@
-export * from './devtools'
+import * as devtools from './devtools'
+
+export const ReactQueryDevtools: typeof devtools['ReactQueryDevtools'] =
+  process.env.NODE_ENV !== 'development'
+    ? function () {
+        return null
+      }
+    : devtools.ReactQueryDevtools
+
+export const ReactQueryDevtoolsPanel: typeof devtools['ReactQueryDevtoolsPanel'] =
+  process.env.NODE_ENV !== 'development'
+    ? (function () {
+        return null
+      } as any)
+    : devtools.ReactQueryDevtoolsPanel