enable zksync tests again (#863)

This pull request includes a small but significant change to the
`package.json` file to enhance the testing process.

Enhancements to testing:

*
[`package.json`](diffhunk://#diff-7ae45ad102eab3b6d7e7896acd08c427a9b25b346470d7bc6507b6481575d519L22-R22):
Modified the `test` script to include running `test:zk` to ensure zkSync
tests are executed along with other tests.

package.json

@@ -19,7 +19,7 @@
         "build:ts": "rimraf dist && tsc -p tsconfig.prod.json",
         "build:ts:dev": "rimraf dist && tsc -p tsconfig.json",
         "test:zk": "HARDHAT_ENABLE_ZKSYNC=1 hardhat test",
-        "test": "hardhat test --network hardhat && npm run test:L1 && npm run test:L2",
+        "test": "hardhat test --network hardhat && npm run test:L1 && npm run test:L2 && npm run test:zk",
         "test:parallel": "hardhat test --parallel",
         "test:L1": "HARDHAT_CHAIN_ID=1 hardhat test --grep '@L1'",
         "test:L2": "SAFE_CONTRACT_UNDER_TEST=SafeL2 hardhat test --network hardhat",