v3.4.5

• fix: monaco-editor-webpack-plugin don't work in 3.4 (#6326) e6c4403
• fix: process undefined when webpack 5 is enabled (#6325) e3f1c42
• chore(postcss): test case for postcss-preset-env (#6315) 9bc6db8
• docs: ssr.zh-CN.md (#6316) b586196

v3.4.4...v3.4.5