Updated pod spec not pushed to CocoaPods repo

[bencallis]

The latest pod spec with Swift and ObjC subspecs has not been pushed to the central CocoaPod repo so currently can't be used.

Could you please update it.

PR that was merged with the updated spec #7

[lilyball]

Oops, totally forgot that was a step. Sorry!

[lilyball]

D'oh, cocoapods won't let me push the podspec without bumping the version. I don't really want to bump the version of the library just for a cocoapods change but I guess I have no choice.

[lilyball]

> pod trunk push

[!] Found podspec `PMKVObserver.podspec`
Updating spec repo `master`

Validating podspec
 -> PMKVObserver (1.0.4)

Updating spec repo `master`

  - Data URL: https://raw.githubusercontent.com/CocoaPods/Specs/a07c7192985b4f928086c2a7597ef82859b11e90/Specs/PMKVObserver/1.0.4/PMKVObserver.podspec.json
  - Log messages:
    - March 2nd, 13:21: Push for `PMKVObserver 1.0.4' initiated.
    - March 2nd, 13:21: Push for `PMKVObserver 1.0.4' has been pushed (3.864056919 s).

[bencallis]

@kballard Thanks very much!

It's very easy to forget 👍