message: ts: allow using ?? operator in jest tests
diff: "include": ["src", "types"],
  "compilerOptions": {
  "allowSyntheticDefaultImports": true,
  - "target": "esnext",
  + "target": "es2019",
  "module": "esnext",
  "lib": ["dom", "esnext"],
  "importHelpers": true,
  