fix: use valid SPDX license identifier in package.json (#387)

Change license field from "Apache 2.0" to "Apache-2.0" so GitHub and npm can recognize it correctly.

Co-authored-by: Isaac

Author: sreekanth-db

package.json

@@ -45,7 +45,7 @@
     "hive",
     "hive js"
   ],
-  "license": "Apache 2.0",
+  "license": "Apache-2.0",
   "devDependencies": {
     "@types/chai": "^4.3.14",
     "@types/http-proxy": "^1.17.14",