Merge branch 'master' into fix-splitfreq-weights

* master: (43 commits)
  build: move dev dependencies from dependencies array and remove unused dependencies
  build: fix offical node version to 16.15.0
  chore: delete unused directory `browser/build`
  docs: remove holiday text from README
  build: update downshift patch to match installed version
  style: revert to using var to minimise diff
  style: replace var with const
  fix: enforce proper length constraints on timestamp counter and node id
  test: fix test to properly pass in invalid inputs individually
  ci: re-add runner os specific caches
  ci: turn boilerplate into composite action
  ci: only build electron app on master
  docs: add comment explaining how to reactivate code signing
  build: remove signing config
  ci: avoid attempting to get CSC_KEY_PASSWORD interactively in github actions
  ci: always use bash as the shell
  ci: cache node_modules per runner os
  ci: avoid duplicate linting in CI
  ci: add electron build to CI
  ci: build api and web packages in CI
  ...