fix(overmind-vue): initialize on beforeCreate to allow pointing to state in data

Author: christianalfoni

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

@@ -10,7 +10,7 @@ function createMixin(overmind, propsCallback) {
   let componentInstanceId = 0
 
   return {
-    beforeMount(this: any) {
+    beforeCreate(this: any) {
       if (overmind.mode.mode === MODE_SSR) {
         this.overmind = {
           state: overmind.state,