[Fable] support warning about arctokenization

[Freymaurer]

This also makes fable throw an error in these tests:

let private ExtendedContainer = testList "ExtendedContainer" [

    let version = "0.0.1"
    let protocol = new Protocol()

    do protocol.Version <- version

    testCase "HasValue" (fun _ ->
        let result = Dictionary.containsKey Protocol.VersionProperty protocol
        Expect.isTrue result ""
    )
    testCase "HasOneItem" (fun _ ->
        let result = Dictionary.count protocol
        Expect.equal 1 result ""
    )
    testCase "CanRetrieve" (fun _ ->
        let result = protocol.Version
        Expect.equal version result ""
    )
]

Can be seen with build.cmd watchtestsjs

[HLWeil]

Just so i don't forget about this:

Oh, so you can't use static values for inherited constructors.. That's a bit annoying but maybe we can circumvent it by having an internal primary constructor and calling that with an parameterless alternative constructor.