chore(deps-dev): bump @zeit/ncc from 0.20.5 to 0.21.1

Bumps [@zeit/ncc](https://github.com/zeit/ncc) from 0.20.5 to 0.21.1.
- [Release notes](https://github.com/zeit/ncc/releases)
- [Commits](https://github.com/zeit/ncc/compare/0.20.5...0.21.1)

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

package-lock.json

@@ -997,9 +997,9 @@
       "dev": true
     },
     "@zeit/ncc": {
-      "version": "0.20.5",
-      "resolved": "https://registry.npmjs.org/@zeit/ncc/-/ncc-0.20.5.tgz",
-      "integrity": "sha512-XU6uzwvv95DqxciQx+aOLhbyBx/13ky+RK1y88Age9Du3BlA4mMPCy13BGjayOrrumOzlq1XV3SD/BWiZENXlw==",
+      "version": "0.21.1",
+      "resolved": "https://registry.npmjs.org/@zeit/ncc/-/ncc-0.21.1.tgz",
+      "integrity": "sha512-M9WzgquSOt2nsjRkYM9LRylBLmmlwNCwYbm3Up3PDEshfvdmIfqpFNSK8EJvR18NwZjGHE5z2avlDtYQx2JQnw==",
       "dev": true
     },
     "JSONStream": {