Update to test cordova-plugin-inappbrowser@3

Add localstorage test

Must stringify messages for postMessage

Test postMessage

Add buttons to test JS dialogs within IAB window

Merge branch 'master' of https://github.com/dpa99c/cordova-plugin-inappbrowser-wkwebview-test

Update docs

Update to test show/hide and initial hide

Illustrate shared cookie pool

Fix plugin refs

Unpin cordova-ios version

Initial prep for release

Set an interval to repeatedly inject script into IAB

Prefix app name with WK

Configure for WKWebView version of IAB