Bump log4js and karma-viewport

Bumps [log4js](https://github.com/log4js-node/log4js-node) to 6.4.1 and updates ancestor dependency [karma-viewport](https://github.com/squidfunk/karma-viewport). These dependencies need to be updated together.


Updates `log4js` from 4.5.1 to 6.4.1
- [Release notes](https://github.com/log4js-node/log4js-node/releases)
- [Changelog](https://github.com/log4js-node/log4js-node/blob/master/CHANGELOG.md)
- [Commits](log4js-node/log4js-node@v4.5.1...v6.4.1)

Updates `karma-viewport` from 1.0.7 to 1.0.9
- [Release notes](https://github.com/squidfunk/karma-viewport/releases)
- [Changelog](https://github.com/squidfunk/karma-viewport/blob/master/CHANGELOG)
- [Commits](squidfunk/karma-viewport@1.0.7...1.0.9)

---
updated-dependencies:
- dependency-name: log4js
  dependency-type: indirect
- dependency-name: karma-viewport
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -24,7 +24,7 @@
 		"karma-firefox-launcher": "^1.3.0",
 		"karma-jasmine": "^4.0.1",
 		"karma-jasmine-dom": "^1.0.1",
-		"karma-viewport": "^1.0.7"
+		"karma-viewport": "^1.0.9"
 	},
 	"dependencies": {}
 }