Add path alias to TS demo tsconfig (#2771)

Author: KenanYusuf

demo/tsconfig.json

@@ -1,3 +1,8 @@
 {
   "extends": "../tsconfig.base.json",
+  "compilerOptions": {
+    "paths": {
+      "victory*": ["../packages/victory*"],
+    }
+  }
 }