fix(overmind): exclude base state keys on resetting statemachine state

Author: christianalfoni

packages/node_modules/overmind/src/statemachine.ts

@@ -91,11 +91,13 @@ export class StateMachine<Base extends IState, States extends TStates, State ext
 
     if (transitions[this.state].includes(state)) {
       const tree = (this[PROXY_TREE].master.mutationTree || this[PROXY_TREE])
-      const base = this[VALUE][BASE]
+      const baseKeys = Object.keys(this[VALUE][BASE])
 
       tree.enableMutations()
       this[VALUE][CURRENT_KEYS].forEach((key) => {
-        delete this[key]
+        if (!baseKeys.includes(key)) {
+          delete this[key]
+        }
       })
 
       Object.assign(this, newState)