vuepress-theme-plume/packages/plugin-copy-code/tsconfig.esm.json

{
  "extends": "../../tsconfig.base.json",
  "compilerOptions": {
    "module": "ES2020",
    "rootDir": "./src",
    "outDir": "./lib",
    "types": ["@vuepress/client/types"]
  },
  "include": ["./src/client", "./src/shared"]
}