fix webpack config problem caused by breaking changes of worker-loader #12244
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Hi, this is my first time to contribute to pdf.js. I already read the
Contributing
wiki and try to follow it. But if I made any mistake please let me know. Thanks!The problem is caused by a breaking change from worker-loader(https://github.com/webpack-contrib/worker-loader/releases/tag/v3.0.0). It switches on ES module syntax by default now, so if pdfjs webpack config still uses CommonJS module,
esModule=false
need to be set for worker-loader.