@jsse/tsconfig/tsconfig.strict.json

tsconfig

{
  "$schema": "http://json.schemastore.org/tsconfig",
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "checkJs": true,
    "allowUnreachableCode": false,
    "allowUnusedLabels": false,
    "exactOptionalPropertyTypes": true,
    "skipLibCheck": true
  }
}