Merge branch 'sc-9148-idiomatic-plugin-dot-swift' into jasontibbetts/…

…sc-11674/update-to-ios-3-5-3

* sc-9148-idiomatic-plugin-dot-swift:
  [sc-9148] [project] Reverted the changed in the top-level package.json; the fix was needed only in the Example's package.json.
  [sc-9148] [project] Tried a workaround for the lib/mappings.wasm error (gatsbyjs/gatsby#35607 (comment)), but no dice.
  [sc-9148] [project] Tried a workaround for the lib/mappings.wasm error (gatsbyjs/gatsby#35607 (comment)), but no dice.
  [sc-9148] [project] Re-synced modules.
  [sc-9148] [project] Reverted the run script to be iOS-only.
  [sc-9148] [project] Docs.
  [sc-9148] [project] The run_example script now runs `gradlew assemble` for Android builds.
  [sc-9148] [refactor] Used a little more idiomatic Swift, meaning more guard statements, switches, and inferred types.