fix: snapshot

Author: prestwich

.gas-snapshot

@@ -1,7 +1,7 @@
 HelpersTest:test_signature() (gas: 6587)
-ZenithTest:test_badSequence() (gas: 77336)
-ZenithTest:test_badSignature() (gas: 66901)
-ZenithTest:test_blockExpired() (gas: 55457)
-ZenithTest:test_notSequencer() (gas: 58632)
-ZenithTest:test_onePerBlock() (gas: 121189)
-ZenithTest:test_submitBlock() (gas: 88201)
+ZenithTest:test_badSequence() (gas: 77167)
+ZenithTest:test_badSignature() (gas: 66732)
+ZenithTest:test_blockExpired() (gas: 55352)
+ZenithTest:test_notSequencer() (gas: 58463)
+ZenithTest:test_onePerBlock() (gas: 124492)
+ZenithTest:test_submitBlock() (gas: 91609)