Replace 'Array' with 'ContiguousArray'

[shoheiyokoyama]

Description

Reducer and Middleware are aliases of closure. closure is Reference Type as apple doc

Array of reference types should use ContiguousArray.
For ContiguousArray, it is described in Apple document as follows.

If you need an array of reference types and the array does not need to be bridged to NSArray, use ContiguousArray instead of Array
Ref: Advice: Use ContiguousArray with reference types when NSArray bridging is unnecessary

using ContiguousArray may be more efficient and have more predictable performance than Array.
Ref: ContiguousArray

I replaced Array type of reducers and middlewares with ContiguousArray.

Checklist

• this PR is based on develop or a 'develop related' branch
• the commits inside this PR have explicit commit messages
• the Jazzy documentation has been generated (if needed -> Jazzy RxReduce)

[shoheiyokoyama]

@twittemb
What is the option to generate Jazzy documentation? author, author_url, github_url, etc.

[twittemb]

Hi

In general I pass no particular option, just 'jazzy RxReduxe'

[shoheiyokoyama]

@twittemb
I just updated jazzy documentation.

[twittemb]

Thanks. I didn't know about Contiguous arrays. Thanks for sharing all the optimization tips.

I'll merge the PR asap.

👍

[twittemb]

Thanks @shoheiyokoyama