possibility use many instances [#5]

package.json

@@ -1,6 +1,6 @@
 {
   "name": "redux-dynamic-middlewares",
-  "version": "0.5.0",
+  "version": "0.6.0",
   "description": "Allow add or remove redux middlewares dynamically",
   "main": "lib/index.js",
   "scripts": {

src/index.js

@@ -1,37 +1,53 @@
 import { compose } from 'redux'
 
-let allDynamicMiddlewares = []
+const createDynamicMiddlewares = () => {
+  let allDynamicMiddlewares = []
 
-const dynamicMiddlewares = store => next => (action) => {
-  const chain = allDynamicMiddlewares.map(middleware => middleware(store))
+  const enhancer = store => next => (action) => {
+    const chain = allDynamicMiddlewares.map(middleware => middleware(store))
 
-  return compose(...chain)(next)(action)
-}
+    return compose(...chain)(next)(action)
+  }
 
-const addMiddleware = (...middlewares) => {
-  allDynamicMiddlewares = [...allDynamicMiddlewares, ...middlewares]
-}
+  const addMiddleware = (...middlewares) => {
+    allDynamicMiddlewares = [...allDynamicMiddlewares, ...middlewares]
+  }
 
-const removeMiddleware = (middleware) => {
-  const index = allDynamicMiddlewares.findIndex(d => d === middleware)
+  const removeMiddleware = (middleware) => {
+    const index = allDynamicMiddlewares.findIndex(d => d === middleware)
 
-  if (index === -1) {
-    // eslint-disable-next-line no-console
-    console.error('Middleware does not exist!', middleware)
+    if (index === -1) {
+      // eslint-disable-next-line no-console
+      console.error('Middleware does not exist!', middleware)
 
-    return
+      return
+    }
+
+    allDynamicMiddlewares = allDynamicMiddlewares.filter((_, mdwIndex) => mdwIndex !== index)
   }
 
-  allDynamicMiddlewares = allDynamicMiddlewares.filter((_, mdwIndex) => mdwIndex !== index)
-}
+  const resetMiddlewares = () => {
+    allDynamicMiddlewares = []
+  }
 
-const resetMiddlewares = () => {
-  allDynamicMiddlewares = []
+  return {
+    enhancer,
+    addMiddleware,
+    removeMiddleware,
+    resetMiddlewares,
+  }
 }
 
-export default dynamicMiddlewares
-export {
+const dynamicMiddlewaresInstance = createDynamicMiddlewares()
+
+export default dynamicMiddlewaresInstance.enhancer
+
+export const {
   addMiddleware,
   removeMiddleware,
   resetMiddlewares,
+} = dynamicMiddlewaresInstance
+
+export {
+  createDynamicMiddlewares,
 }