Bump node-abi from 2.20.0 to 2.21.0

Bumps [node-abi](https://github.com/lgeiger/node-abi) from 2.20.0 to 2.21.0.
- [Release notes](https://github.com/lgeiger/node-abi/releases)
- [Commits](https://github.com/lgeiger/node-abi/compare/v2.20.0...v2.21.0)

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

package.json

@@ -32,7 +32,7 @@
     "json-loader": "0.5.7",
     "lru-cache": "^6.0.0",
     "macos-release": "^2.4.1",
-    "node-abi": "^2.19.3",
+    "node-abi": "^2.21.0",
     "node-gyp": "^7.1.2",
     "node-sass": "^5.0.0",
     "npmlog": "4.1.2",