cache fonts in build

[jacobg]

Upstream failures can break the build:
majodev/google-webfonts-helper#81

Perhaps it would be a good idea to cache the fonts on the build machine, so such an issue doesn't break the build. And even when it's working, it would be more efficient to cache.

[subins2000]

I've made a cache feature in this PR : beyonk-group#3

Also see #22 (comment)

[jacobg]

Thanks @subins2000

The caching doesn't seem to take effect, because on either version 1.5.0 or 1.7.0 there is an upstream failure right now. It should be cached as I use it all the time.

40% building 58/89 modules 31 active /Users/j/workspace/f/console/node_modules/@fortawesome/pro-solid-svg-icons/index.es.js(node:14651) UnhandledPromiseRejectionWarning: Error: Service Unavailable