tsconfig.json

{
  "compilerOptions": {
    "target": "es2017",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "allowSyntheticDefaultImports": true,
    "resolveJsonModule": true,
    "downlevelIteration": true,
    "importHelpers": true,
    "removeComments": false,

    "strictNullChecks": true,
    "noImplicitUseStrict": true,
    "noImplicitAny": false,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noUnusedParameters": false,
    "noErrorTruncation": true,
    "esModuleInterop": true,

    "experimentalDecorators": true,
    "forceConsistentCasingInFileNames": true,
    "allowJs": false,
    "checkJs": false,

    "baseUrl": ".",
    "outDir": "build",
    "lib": ["es2017", "dom"],

    "typeRoots": ["../node_modules/@types", "./node_modules/@types"]
  },

  "include": ["typings", "src"],

  "exclude": ["node_modules", "dist", "typings/contracts/*/**"]
}