build(deps): bump pngjs from 3.4.0 to 5.0.0

Bumps [pngjs](https://github.com/lukeapage/pngjs) from 3.4.0 to 5.0.0.
- [Release notes](https://github.com/lukeapage/pngjs/releases)
- [Commits](https://github.com/lukeapage/pngjs/commits)

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

package.json

@@ -50,7 +50,7 @@
     "npmlog": "^4.1.2",
     "plist": "^3.0.1",
     "pluralize": "^8.0.0",
-    "pngjs": "^3.0.0",
+    "pngjs": "^5.0.0",
     "request": "^2.83.0",
     "request-promise": "^4.2.2",
     "rimraf": "^3.0.0",