fix bug

Author: pharms-eth

Tests/web3swiftTests/localTests/LocalTestCase.swift

@@ -15,8 +15,10 @@ class LocalTestCase: XCTestCase {
     override func setUp() async throws {
         let web3 = try! await Web3.new(LocalTestCase.url)
 
-        let block = try! await web3.eth.blockNumber()
-        if block >= 25 { return }
+        guard let block = try? await web3.eth.blockNumber() else {
+            return
+        }
+        guard block < 25 else { return }
 
         print("\n ****** Preloading Ganache (\(25 - block) blocks) *****\n")