shlinkio/shlink-web-client v4.0.0 on GitHub

#338 Extract @shlinkio/shlink-web-component and @shlinkio/shlink-frontend-kit as external libs.
#978 Use system preferred theme as default theme.
Use API client from @shlinkio/shlink-js-sdk to consume Shlink servers.
#902 Docker image is no longer running as root. As a side effect, exposed port is 8080, not 80 anymore.
shlink-web-component #117 Migrate charts from Chart.JS to Recharts.

shlink-web-component #7 Allow comparing visits for multiple short URLs, tags or domains.
When in the tags, domains or short URLs tables, you can now pick up to 5 items to compare their visits. Once selected, you are taken to a section displaying a comparative line chart, which supports all regular visits filtering capabilities.
shlink-web-component #9 Allow comparing visits with the previous period.
shlink-web-component #12 and #13 Add new "Visits options" section for arbitrary visit stats options. Add section to delete short URL and orphan visits there.
This section is only visible if short URL visits deletion or orphan visits deletion are supported by connected Shlink server.
shlink-web-component #10 Improve general accessibility: Add accessibility tests, fix accessibility issues and enable accessibility linting rules.

#910 Fix warnings related with missing act in tests and refs in AppUpdateBanner.