ignorePattern doesn't seem to be working

Howdy 👋

Just trying to stop this gzipping my sourcemaps and I've been trying to add an ignorePattern that doesn't seem to be working 😕

I've tried `ignorePattern: '**.map'` and `ignorePattern: '*.map'` but they both still gzipped my sourcemaps. I even tried `ignorePattern: '\*\*/\*.map',` which I lifted from the default filePattern 😂

I ended up working around this by just using filePattern with `map` removed as an option, but I figured I should open an issue to see if there is anything I can do to help. I would love to add a failing test if someone could at least point me in the right direction.

首先追踪 plugin 如何读取和应用 ignorePattern，并将其与正常工作的 filePattern 选项进行比较。使用报告中的模式重现 sourcemap 情况；如果 repository 已有现成的测试入口，则添加一个失败测试；当匹配的 .map 文件保持未压缩，而其他符合条件的文件仍会进行 gzip 压缩时，即视为完成。

由索引模型根据 Issue 内容生成。