getSyncingStats test fails when RPC returns false

[wojciechos]

Describe the bug
The getSyncingStats test fails when the RPC returns false. The test expects an object matching the SyncingStatus schema, but doesn't handle the case where false is returned, which is a valid response.

To Reproduce

1. Run the RPC provider tests using a synced Juno node(then result should be false). E.g:
   TEST_RPC_URL=https://free-rpc.nethermind.io/sepolia-juno npm run test -- -t getSyncingStats

2. Observe the failure

Expected behavior
Test should pass when starknet_syncing results is false

Desktop (please complete the following information):

• Starknet.js v6.15.0
• Network testnet
• Node version v22.8.0

[od-hunter]

Hi @wojciechos , is this open for contribution?