#if _DEBUG blocks are always removed in packages' default exports

[SuperSodaSea]

The _DEBUG is only defined when building plugins / bundles, so the #if _DEBUG blocks are always removed in packages' default exports. If users are using PixiJS with a bundler, they will never recieve deprecation warnings in #if _DEBUG blocks.

For example, in 7.1.0-alpha, the user will never recieve the deprecation warning with:

import { ShaderSystem } from '@pixi/core';
import { install } from '@pixi/unsafe-eval';

install({ ShaderSystem });

I wondered if there is a good way to solve this problem. Maybe by adding "development" and "production" fields in "exports" in package.json?

[bigtimebuddy]

Good catch! This was an oversight. I had assumed debug statements would be included in lib/* output. But it wasn't.