fix: package.json & yarn.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-SOCKETIOPARSER-3091012
- https://snyk.io/vuln/SNYK-JS-ANSIREGEX-1583908
- https://snyk.io/vuln/SNYK-JS-MOMENT-2944238
- https://snyk.io/vuln/SNYK-JS-SOCKETIOPARSER-1056752
- https://snyk.io/vuln/SNYK-JS-MOMENT-2440688
- https://snyk.io/vuln/SNYK-JS-WS-1296835

package.json

@@ -33,7 +33,7 @@
     "jsbarcode": "^3.9.0",
     "libphonenumber-js": "^1.9.11",
     "moment": "^2.20.1",
-    "moment-timezone": "^0.5.21",
+    "moment-timezone": "^0.5.41",
     "node-sass": "^5.0.0",
     "quagga": "^0.12.1",
     "quill": "2.0.0-dev.4",
@@ -42,8 +42,8 @@
     "rollup-plugin-node-builtins": "^2.1.2",
     "rollup-plugin-node-globals": "^1.4.0",
     "@sentry/browser": "^6.8.0",
-    "showdown": "^1.9.1",
-    "socket.io": "^2.0.4",
+    "showdown": "^2.0.2",
+    "socket.io": "^4.3.0",
     "superagent": "^3.8.2",
     "touch": "^3.1.0",
     "vue": "^2.6.11",