Bump to v2.1.5-pre.1 - Fix postinstall.js NODE_ENV check

[wipfli]

Launch Checklist

Follow-up on #991, #992. Fixes #990.

• Confirm your changes do not include backports from Mapbox projects (unless with compliant license) - if you are not sure about this, please ask!
• Briefly describe the changes in this PR.
• Include before/after visuals or gifs if this PR includes visual changes.
• Write tests for all new functionality.
• Document any changes to public APIs.
• Post benchmark scores.
• Manually test the debug page.
• Suggest a changelog category: bug/feature/docs/etc. or "skip changelog".
• Add an entry inside this element for inclusion in the maplibre-gl-js changelog: <changelog></changelog>.

[wipfli]

I am playing here with getting the environment variable stuff right. But the best solution in my view would be to publish this library with an empty postinstall.js file. Then we don't have to configure anything in our dev environments and users can set NODE_ENV to whatever they want. With the current solution here, a user might set a global variable NODE_ENV='development' and then the same error as after #992 happens.

[github-actions]

Bundle size report:

Size Change: +5 B
Total Size Before: 194 kB
Total Size After: 194 kB

Output file	Before	After	Change
maplibre-gl.js	185 kB	185 kB	+5 B
maplibre-gl.css	9.43 kB	9.43 kB	0 B

ℹ️ View Details

No major changes

[HarelM]

I think publishing an empty postinstall.js file is a good solution.

[HarelM]

I'm not sure how this can be done easily, but the first thing that comes to my mind is doing it in the release.yml script...?

[HarelM]

Another option is to remove this line from package.json just before publishing the package, again in the release.yml script, but this is probably harder as it requires to change a part of a file and not a whole file. IDK...

[wipfli]

#994