Add a keyword to package.json

Author: SeungMin Lee

package.json

@@ -26,7 +26,8 @@
  "url": "git+https://github.com/CodeChain-io/foundry-primitives-js.git"
  },
  "keywords": [
- "CodeChain"
+ "CodeChain",
+ "Foundry"
  ],
  "author": "CodeChain Team <hi@codechain.io>",
  "license": "ISC",