chore: add changeset

ethereum-optimism · Oct 14, 2021 · 0aaf14d · 0aaf14d
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+---
+'@eth-optimism/l2geth': minor
+'@eth-optimism/contracts': minor
+'@eth-optimism/integration-tests': patch
+---
+
+Introduces a new opcode L1BLOCKNUMBER to replace old functionality where blocknumber would return the L1 block number and the L2 block number was inaccessible.