Bump webpack-command from 0.2.0 to 0.3.1

Bumps [webpack-command](https://github.com/webpack-contrib/webpack-command) from 0.2.0 to 0.3.1.
- [Release notes](https://github.com/webpack-contrib/webpack-command/releases)
- [Commits](webpack-contrib/webpack-command@v0.2.0...v0.3.1)

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

Author: dependabot-support

package-lock.json

@@ -29,7 +29,7 @@
     "ts-loader": "^4.3.1",
     "typescript": "^2.7.2",
     "webpack": "^4.0.0",
-    "webpack-command": "^0.2.0",
+    "webpack-command": "^0.3.1",
     "webpack-node-externals": "^1.6.0"
   }
 }