Add entry for Miniprogram for package.json (#1849)

* copy tf-core.min.js files for miniprogram

* fix the directory

Author: pyu10055

package.json

@@ -9,6 +9,7 @@
   "types": "dist/index.d.ts",
   "jsnext:main": "dist/tf-core.esm.js",
   "module": "dist/tf-core.esm.js",
+  "miniprogram": "dist/miniprogram",
   "engines": {
     "yarn": ">= 1.3.2"
   },

scripts/build-npm.sh

@@ -22,4 +22,10 @@ yarn
 yarn build
 yarn build-test-snippets
 yarn rollup -c --visualize
+
+# Use minified files for miniprogram
+mkdir dist/miniprogram
+cp dist/tf-core.min.js dist/miniprogram/index.js
+cp dist/tf-core.min.js.map dist/miniprogram/index.js.map
+
 echo "Stored standalone library at dist/tf-core(.min).js"