Merge pull request #4379 from ethereum-optimism/willc/forge-test-coverage

feat(contracts-periphery): Add package.json script for forge test coverage

.changeset/stale-crews-kiss.md

+---
+'@eth-optimism/contracts-periphery': patch
+---
+
+Add test coverage script to contracts periphery

packages/contracts-periphery/package.json

@@ -20,6 +20,7 @@
     "test:contracts": "hardhat test --show-stack-traces",
     "test:forge": "forge test",
     "test:coverage": "NODE_OPTIONS=--max_old_space_size=8192 hardhat coverage && istanbul check-coverage --statements 90 --branches 82 --functions 88 --lines 90",
+    "test:coverage:forge": "forge coverage",
     "test:slither": "slither .",
     "gas-snapshot": "forge snapshot",
     "pretest:slither": "rm -f @openzeppelin && rm -f hardhat && ln -s node_modules/@openzeppelin @openzeppelin && ln -s ../../node_modules/hardhat hardhat",