Ensured that raw aps data is correctly parsed

[aontas]

This change ensures that the dashboard will support the following JSON payload:

{
    "aps" : {
        "alert" : {
            "title" : "Game Request",
            "body" : "Bob wants to play poker",
            "action-loc-key" : "PLAY"
        },
        "badge" : 5
    },
    "acme1" : "bar",
    "acme2" : [ "bang",  "whiz" ]
}

or this one:

{
    "aps" : {
        "alert" : {
            "loc-key" : "GAME_PLAY_REQUEST_FORMAT",
            "loc-args" : [ "Jenna", "Frank"]
        },
        "sound" : "chime.aiff"
    },
    "acme" : "foo"
}

This is a more advanced way of sending aps data, sure, but this ensures that current and future unsupported keys will continue to work.

[codecov[bot]]

Codecov Report

Merging #95 into master will not change coverage. The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #95   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           5      5           
  Lines         254    256    +2     
=====================================
+ Hits          254    256    +2

Impacted Files	Coverage Δ
src/APNS.js	100% <100%> (ø)	:arrow_up:

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