acorn-typescript/tsconfig.json

Alternative, TypeScript parser

{
  "compilerOptions": {
    "allowJs": false,
    "target": "es6",
    "allowSyntheticDefaultImports": true,
    "moduleResolution": "node",
    "outDir": "lib",
    "experimentalDecorators": true,
    "lib": ["es2017", "dom"],
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "preserveConstEnums": true,
    "removeComments": false,
    "sourceMap": true,
    "strict": false
  },
  "include": ["./src/*", "./types/*"],
  "exclude": ["node_modules", "lib"]
}