pxt-jacdac/tsconfig.json

{
    "compilerOptions": {
        "target": "es5",
        "noImplicitAny": true,
        "outDir": "built",
        "rootDir": "."
    },
    "exclude": [
        "*/*test.ts",
        "pxt_modules/**/*test.ts"
    ],
    "include": [
        "*.ts",
        "*/*.ts",
        "pxt_modules/**/*.ts"
    ]
}