StoreManager should take an enhancer object

[HerbCaudill]

Currently the StoreManager constructor takes an array of middlewares.

export const storeManager = new StoreManager({
  databaseName: 'todo',
  proxyReducer,
  initialState,
  urls,
  middlewares: [logger],
})

To maintain consistency with the Redux createStore interface, this should accept a StoreEnhacer:

export const storeManager = new StoreManager({
  databaseName: 'todo',
  proxyReducer,
  initialState,
  urls,
  middlewares: applyMiddleware([logger]),
})

I think the difficulty had to do with composing an existing enhancer with the Redux Dev Tools browser extension here:

https://github.com/DevResults/cevitxe/blob/dffe4ac90008f0777e16fb6170d2d1b88f0c0ef2/packages/core/src/StoreManager.ts#L72-L79

We haven't really used the Redux Dev Tools, so we could just not wire it up. Or we could figure out how to make it work. See http://github.com/zalmoxisus/redux-devtools-extension#1-with-redux