Migrate to ESM

[vikingair]

• Verify that the generated output is still fine
• Check that inclusion of package still works when installed
• Fix broken test "supports resolve root paths in webpack config"

[vikingair]

@pahen This change was necessary in order to update some of the very outdated dependencies. Non-ESM projects will not be able to import "madge" anymore via "require". Hopefully, that is not a blocker, as CJS should be already abandoned by a large majority, especially as even more popular libs such as "chalk" have gone this path a long time ago.

What do you think?

And, do you have maybe an idea why the one remaining test might fail?

[vikingair]

@pahen Any feedback from your site? Before investing more time into the PR, I wanted to make sure you agree with this step.

[pahen]

@pahen Any feedback from your site? Before investing more time into the PR, I wanted to make sure you agree with this step.

Note sure about this. The fact that non-ESM projects can't use madge is a big blocker to me.

[vikingair]

@pahen You are the decision maker. In that case, we will need to keep the long time outdated "chalk" dependency or replace it by e.g. picocolors.

What would you prefer?

[pahen]

@pahen You are the decision maker. In that case, we will need to keep the long time outdated "chalk" dependency or replace it by e.g. picocolors.

What would you prefer?

Replacing chalk with picocolors sounds good to me if it provides the same functionally that madge uses.

[vikingair]

Will see when I can find the time :P