message: [build-utils] Fix unit tests from `@vercel/frameworks` type change
  Fixes TypeScript error:
  ```
  test/unit.framework-detector.test.ts:52:40 - error TS4104: The type 'readonly Framework[]' is 'readonly' and cannot be assigned to the mutable type 'Framework[]'.
  52     expect(await detectFramework({ fs, frameworkList })).toBe(null);
  ~~~~~~~~~~~~~
  ```
diff: @@ -3,7 +3,7 @@ import { DetectorFilesystem } from './detectors/filesystem';
  export interface DetectFrameworkOptions {
  fs: DetectorFilesystem;
  - frameworkList: Framework[];
  + frameworkList: readonly Framework[];
  }
  async function matches(fs: DetectorFilesystem, framework: Framework) {
  