fix: Add keccak to devDependencies

Signed-off-by: yashrajdesai <yashrajdesai30@gmail.com>

Author: yashrajdesai

package.json

@@ -39,7 +39,6 @@
     "ed25519.js": "^1.3.0",
     "google-protobuf": "^3.9.1",
     "js-sha3": "^0.8.0",
-    "keccak": "^3.0.2",
     "lodash.clonedeep": "^4.5.0",
     "lodash.flow": "^3.5.0",
     "lodash.isequal": "^4.5.0",
@@ -61,6 +60,7 @@
     "eslint-plugin-standard": "^4.0.0",
     "grpc": "^1.22.2",
     "husky": "^3.0.3",
+    "keccak": "^3.0.2",
     "shx": "^0.3.2",
     "ts-proto": "^1.41.1",
     "typescript": "^3.5.3"