tsconfig.json

{
    "compilerOptions": {
        "strictNullChecks": true,
        "strictPropertyInitialization": true,
        "noUncheckedIndexedAccess": true,
        "useUnknownInCatchVariables": true,
        "noImplicitAny": true,
        "noImplicitOverride": true,
        "noImplicitReturns": true,
        "noImplicitThis": true,
        "strictFunctionTypes": true,
        "strictBindCallApply": true,
        "module": "es6",
        "target": "es6",
        "esModuleInterop": true,
        "moduleResolution": "node",
        "lib": ["ES6", "ES7", "DOM", "ESNext"],
        "types": ["jest", "node"],
        "declaration": false,
        "preserveConstEnums": true,
        "stripInternal": true
    },
    "ts-node": {
        "compilerOptions": {
            "module": "CommonJS"
        }
    }
}