fix(overmind): fix running indication on operators

Author: christianalfoni

packages/node_modules/overmind/src/operator.ts

@@ -3,19 +3,20 @@ import {
   makeStringifySafeMutations,
   createActionsProxy,
   ORIGINAL_ACTIONS,
- MODE_TEST } from './utils'
+  MODE_TEST,
+} from './utils'
 import { EventType, Execution } from './internalTypes'
 import { safeValue } from './Devtools'
 import { IContext, IConfiguration, IOperator } from './types'
 
-
 export function operatorStarted(type, arg, context) {
   if (process.env.NODE_ENV === 'production') {
     return
   }
   const name =
     typeof arg === 'function' ? arg.displayName || arg.name : String(arg)
 
+  context.execution.isRunning = true
   context.execution.emit(EventType.OPERATOR_START, {
     ...context.execution,
     name,