fix: add cpy for the declaration file

Author: aminya

package.json

@@ -18,7 +18,7 @@
     "lib:wasm:build:debug": "asc lib/assembly/as-bind.ts -b dist/as-bind.debug.wasm -t dist/as-bind.debug.wat --sourceMap --debug --runtime full",
     "lib:wasm:build:optimized": "asc lib/assembly/as-bind.ts -b dist/as-bind.wasm --sourceMap dist/as-bind.wasm.map -t dist/as-bind.wat --runtime full -O3",
     "lib:wasm:build:cp": "cpy 'lib/assembly/**/*' dist",
-    "lib:js:build": "rollup -c --environment LIB,PROD",
+    "lib:js:build": "rollup -c --environment LIB,PROD && cpy 'lib/as-bind.d.ts' dist",
     "lib:js:build:dev": "rollup -c --environment LIB,DEV",
     "lib:test:build": "asc lib/assembly/as-bind.ts test/assembly/test.ts -b test/assembly/test.wasm --runtime full --debug",
     "lib:deploy": "npm run build && np",