Don't install open-sans in vendor

composer.json

@@ -27,6 +27,7 @@
     "jawira/case-converter": "^3.4",
     "jean85/pretty-package-versions": "^1.3",
     "mathmarques/smarty-view": "^1.1",
+    "oomphinc/composer-installers-extender": "^2.0",
     "paragonie/csp-builder": "^2.5",
     "rinvex/countries": "^6.1",
     "rudloff/alltube-library": "dev-develop",
@@ -57,6 +58,19 @@
     },
     "sort-packages": true
   },
+  "extra": {
+    "installer-paths": {
+      "assets/{$name}": [
+        "webfontkit/open-sans"
+      ],
+      "vendor/{$vendor}/{$name}/": [
+        "type:library"
+      ]
+    },
+    "installer-types": [
+      "library"
+    ]
+  },
   "autoload": {
     "psr-4": {
       "Alltube\\": "classes/"