tsconfig.json

{
    "compilerOptions": {
        "declaration": true,
        "declarationDir": "./build",
        "downlevelIteration": true,
        "esModuleInterop": true,
        "forceConsistentCasingInFileNames": true,
        "jsx": "react",
        "lib": [
            "es2017",
            "dom"
        ],
        "module": "es6",
        "moduleResolution": "node",
        "noImplicitAny": true,
        "noImplicitReturns": true,
        "noUnusedLocals": true,
        "outDir": "./build",
        "sourceMap": true,
        "strict": true,
        "strictNullChecks": false,
        "target": "es6"
    },
    "include": [
        "src/**/*"
    ],
    "exclude": [
        "node_modules",
        "build",
        "docs"
    ]
}