chore: error log on install

[MentalGear]

Installing promptfoo 0.8.3 afresh (using pnpm, but npm should be the same):

src/cache.ts:4:26 - error TS7016: Could not find a declaration file for module 'cache-manager'. '/Users/username/Personal/Side Projects/2023/promptfoo/node_modules/.pnpm/cache-manager@4.1.0/node_modules/cache-manager/index.js' implicitly has an 'any' type.
  If the 'cache-manager' package actually exposes this module, consider sending a pull request to amend 'https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/cache-manager'

4 import cacheManager from 'cache-manager';