Bump tailwindcss from 2.2.19 to 3.0.2

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss) from 2.2.19 to 3.0.2.
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/compare/v2.2.19...v3.0.2)

---
updated-dependencies:
- dependency-name: tailwindcss
  dependency-type: direct:development
  update-type: version-update:semver-major
...
Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -85,7 +85,7 @@
     "shallowequal": "^1.1.0",
     "showdown": "^1.6.4",
     "sinon": "^12.0.1",
-    "tailwindcss": "^2.2.19",
+    "tailwindcss": "^3.0.2",
     "tiny-emitter": "^2.0.2",
     "typescript": "^4.0.2",
     "wrap-text": "^1.0.7"