fix: reactjs demo during yarn install, fixes #145

simply remove unused dependencies fixes this issue, but I removed
all package-lock.json / yarn.lock since the demo should always be
in sync with the codebase

demo/browser/package.json

@@ -8,10 +8,8 @@
   },
   "author": "harttle <[email protected]>",
   "license": "ISC",
-  "devDependencies": {
-    "http-server": "^0.11.1"
-  },
   "dependencies": {
-    "liquidjs": "^7.0.0"
+    "http-server": "^0.11.1",
+    "liquidjs": "*"
   }
 }