enable configuration of module.strictExportPresence

[dleavitt]

From what I can tell module.strictExportPresence is sort-of hardcoded to true here:

webpacker/package/environments/base.js

Line 155 in b041a1d

strictExportPresence: true,

It's easy enough to turn of by manually setting it in the per-environment configs like this:

config = environment.toWebpackConfig()
config.module.strictExportPresence = false

module.exports = config

However, it might be nice for this to follow the normal webpacker config setting conventions instead. It's especially useful to turn off when using typescript with transpileOnly: true. When doing this, you'll get warnings along the lines of export 'AnInterface' was not found in './f1' which get turned into errors if strictExportPresence is true.

see TypeStrong/ts-loader#653

[guillaumebriday]

Is this issue still relevant? Feel free to reopen if needed