Reduce the bundle size by removing some lodash usage

[SukkaW]

Since npm-check-updates@17, the code and all the direct dependencies are now bundled together by the Vite.

Currently, the bundle size of the npm-check-updates is 7.1 MiB:

$ npm run build && du -sh build
# ....
7.1M	build

Since npm-check-updates@17 now targets Node.js 18+, we can replace some lodash usage with the native ES6 syntax and features. By doing so, the PR reduces the final bundle size to 6.2 MiB:

$ npm run build && du -sh build
# ....
6.2M	build

[raineorshine]

Thanks, much appreciated!