fix(overmind-react): throw proper error when missing provider

Author: christianalfoni

packages/node_modules/overmind-react/src/index.ts

@@ -92,6 +92,12 @@ export const createHook = <Config extends IConfiguration>(
       Config
     >
 
+    if (!overmind) {
+      throw new Error(
+        'You are not exposing Overmind on the React context. Please make sure you use the Provider, as shown in the React guide'
+      )
+    }
+
     if ((overmind as any).mode.mode === MODE_SSR) {
       return {
         state: overmind.state,