Bump minimist from 1.2.2 to 1.2.3 in /qr-code-app

Bumps [minimist](https://github.com/substack/minimist) from 1.2.2 to 1.2.3.
- [Release notes](https://github.com/substack/minimist/releases)
- [Commits](https://github.com/substack/minimist/compare/1.2.2...1.2.3)

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

Author: dependabot[bot]

qr-code-app/package-lock.json

@@ -20,7 +20,7 @@
     "body-parser": "^1.18.3",
     "express": "^4.16.3",
     "http": "0.0.0",
-    "minimist": "^1.2.2",
+    "minimist": "^1.2.3",
     "qrcode": "^0.9.0",
     "querystring": "^0.2.0",
     "winston": "^2.4.3"