@vitejs/plugin-legacy 自定义 modernPolyfills targets

[ccqgithub]

Description

现在，现代浏览器的polyfills只能基于 { esmodules: true }，不能自定义，希望新增一个参数来自定义。

Suggested solution

添加一个modernTargets参数，传给@vitejs/plugin-legacy，如：

legacy({
        targets: ['chrome 87', 'safari 13', 'firefox 78', 'edge 88'],
        modernPolyfills: true,
        modernTargets: {
          browsers: [
            // 'defaults',
            'chrome 87',
            'safari 13',
            'firefox 78',
            'edge 88'
          ]
        }
      })

插件代码如：

await detectPolyfills(raw, { esmodules: !options.modernTargets, ...options.modernTargets }, modernPolyfills);

Alternative

No response

Additional context

No response

Validations

• [X] Follow our Code of Conduct
• [X] Read the Contributing Guidelines.
• [X] Read the docs.
• [X] Check that there isn't already an issue that request the same feature to avoid creating a duplicate.