No error thrown if invalid type provided, silently falls back to `scatter`

If you enter a type for a trace that is not supported in the package you have, Plotly simply falls back to scatter plot. This is incorrect, an error should be thrown to indicate the user entered an invalid type.

In my particular case, I had been using scattergl type with the full plotly.js-dist bundle, then when I switched our project over to plotly.js-finance (https://github.com/plotly/plotly.js/blob/master/dist/README.md#plotlyjs-finance) I thought everything was working correctly as all our test charts appeared correctly. However, I didn't notice plotly.js-finance did not include scattergl, so was in fact falling back to scatter, which had a significant performance penalty I did not notice while testing. I would have much appreciated an error indicating the type I was providing was not available in the partial bundle I was using.

I've made a code pen of the issue here, using a type "aninvalidtype": https://codepen.io/mofojed/pen/pojpVvP

"aninvalidtype"を使用したリンク先のCodePen再現から始め、完全なplotly.js-distバンドルとplotly.js-financeの間で、特に利用できないscatterglタイプについて動作を比較します。選択されたtraceタイプがパッケージのエントリポイントでどのように解決されるかを追跡します。未サポートのタイプがscatterとして黙ってレンダリングされるのではなくエラーを生成し、partial bundlesに対する回帰テストのカバレッジがあることを完了条件とします。