99f2ffc740
NOTE:
`stemmer` v2.0.0 switched to ES modules (see
words/stemmer@03519229c8), which means
that the only way to consume it in our CommonJS setup (for example, in
[generateKeywords][1]) is via an async `import()`.
This commit makes the `generateKeywords` processor asynchronous in order
to be able to dynamically import and use `stemmer`.
[1]: 251bec159a/aio/tools/transforms/angular-base-package/processors/generateKeywords.js
PR Close #41724