chore: private package use file path dependencies

Author: Garfield550

packages/taro-ui-demo/package.json

@@ -48,7 +48,7 @@
     "@tarojs/taro": "3.0.0-beta.4",
     "react": "^16.10.0",
     "react-dom": "^16.10.0",
-    "taro-ui": "^3.0.0-alpha.1"
+    "taro-ui": "file:../taro-ui"
   },
   "devDependencies": {
     "@babel/core": "^7.8.0",

packages/taro-ui-docs/package.json

@@ -33,7 +33,7 @@
     "react-dom": "^16.13.1",
     "react-router-dom": "^5.1.2",
     "regenerator-runtime": "^0.13.5",
-    "taro-ui-demo": "*"
+    "taro-ui-demo": "file:../taro-ui-demo"
   },
   "devDependencies": {
     "@babel/core": "^7.9.0",