[Bug] Missing Panama Canal

[wohenbushuang]

First thanks for the generated geojson files, it helps me a lot.

Then here is the background. I want to make a global maritime route search in some projects, and I found that all geojson files cannot clearly describe Panama Canal. Since it's an important, busy sea lane, without it I cannot use the geojson files on npm for route search directly. I wish that you can find some ways to solve this.