Bump unfetch from 3.1.2 to 4.2.0

Bumps [unfetch](https://github.com/developit/unfetch) from 3.1.2 to 4.2.0.
- [Release notes](https://github.com/developit/unfetch/releases)
- [Commits](developit/unfetch@3.1.2...4.2.0)

---
updated-dependencies:
- dependency-name: unfetch
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

docs/package.json

@@ -50,7 +50,7 @@
     "style-loader": "^0.23.1",
     "styled-components": "^4.4.1",
     "ts-node": "^9.1.1",
-    "unfetch": "^3.0.0",
+    "unfetch": "^4.2.0",
     "webpack": "^4.30.0",
     "webpack-cli": "^4.10.0",
     "webpack-dev-server": "^3.3.1"

yarn.lock

@@ -17321,7 +17321,7 @@ unc-path-regex@^0.1.2:
   resolved "https://registry.yarnpkg.com/unc-path-regex/-/unc-path-regex-0.1.2.tgz#e73dd3d7b0d7c5ed86fbac6b0ae7d8c6a69d50fa"
   integrity sha1-5z3T17DXxe2G+6xrCufYxqadUPo=
 
-unfetch@^3.0.0, unfetch@^3.1.0:
+unfetch@^3.1.0:
   version "3.1.2"
   resolved "https://registry.yarnpkg.com/unfetch/-/unfetch-3.1.2.tgz#dc271ef77a2800768f7b459673c5604b5101ef77"
   integrity sha512-L0qrK7ZeAudGiKYw6nzFjnJ2D5WHblUBwmHIqtPS6oKUd+Hcpk7/hKsSmcHsTlpd1TbTNsiRBUKRq3bHLNIqIw==