downgrade protobuf to v7.4

# Conflicts:
#	package-lock.json

Author: zglicz

package.json

@@ -146,7 +146,7 @@
     "postcss-sass": "0.5.0",
     "postcss-scss": "4.0.9",
     "postcss-value-parser": "4.2.0",
-    "protobufjs": "8.0.0",
+    "protobufjs": "7.4.0",
     "scslre": "0.3.0",
     "semver": "7.7.3",
     "stylelint": "16.26.1",