🛠 Fix Gatsby Dependencies

[lelia]

Fixes #4.

Changes

• Resolved numerous gatsby and yarn dependency issues
• Pinned newly-resolved dependencies to known-good versions in package.json
• Refreshed the yarn.lock file to reflect the above changes

Confirmed gatsby cleanly builds and runs without issue at http://localhost:8000 after running yarn && yarn build && yarn develop:

yarn install v1.22.19
[1/4] 🔍  Resolving packages...
success Already up-to-date.
✨  Done in 0.26s.
yarn run v1.22.19
$ gatsby build

[...]

info Done building in 21.087853625 sec

Pages

┌ src/templates/doc-page.js
│ ├   /running/wrapping_up/
│ └   ...22 more pages available
└ src/pages/404.js
  ├   /404/
  └   /404.html

✨  Done in 21.24s.
yarn run v1.22.19
$ gatsby develop

[...]

⠀
You can now view AuxEngDocs in the browser.
⠀
  http://localhost:8000/
⠀
View GraphiQL, an in-browser IDE, to explore your site's data and schema
⠀
  http://localhost:8000/___graphql
⠀
Note that the development build is not optimized.
To create a production build, use gatsby build
⠀
success Building development bundle - 3.203s
success Writing page-data.json files to public directory - 0.073s - 1/1 13.76/s