Fix some broken dependencies (#236)

packages/contracts/package.json

@@ -32,12 +32,10 @@
     "deploy": "./bin/deploy.js"
   },
   "dependencies": {
-    "@eth-optimism/solc": "^0.6.12-alpha.1",
     "@ethersproject/abstract-provider": "^5.0.8",
     "@ethersproject/contracts": "^5.0.5",
     "@ethersproject/hardware-wallets": "^5.0.8",
     "@openzeppelin/contracts": "^3.3.0",
-    "ethers": "5.0.0",
     "ganache-core": "^2.12.1",
     "glob": "^7.1.6"
   },
@@ -57,6 +55,7 @@
     "chai": "^4.2.0",
     "copyfiles": "^2.3.0",
     "ethereum-waffle": "3.0.0",
+    "ethers": "^5.0.31",
     "fs-extra": "^9.0.1",
     "hardhat": "^2.0.8",
     "hardhat-typechain": "^0.3.4",
@@ -77,5 +76,8 @@
     "tslint-plugin-prettier": "^2.3.0",
     "typechain": "2.0.0",
     "typescript": "^4.0.2"
+  },
+  "peerDependencies": {
+    "ethers": "^5.0.0"
   }
 }

packages/contracts/yarn.lock

@@ -3813,7 +3813,7 @@ ethers@^4.0.0-beta.1, ethers@^4.0.32:
     uuid "2.0.1"
     xmlhttprequest "1.8.0"
 
-ethers@^5, ethers@^5.0.0, ethers@^5.0.1, ethers@^5.0.14, ethers@^5.0.2, ethers@^5.0.25:
+ethers@^5, ethers@^5.0.0, ethers@^5.0.1, ethers@^5.0.14, ethers@^5.0.2, ethers@^5.0.25, ethers@^5.0.31:
   version "5.0.31"
   resolved "https://registry.yarnpkg.com/ethers/-/ethers-5.0.31.tgz#60e3b1425864fe5d2babc147ede01be8382a7d2a"
   integrity sha512-zpq0YbNFLFn+t+ibS8UkVWFeK5w6rVMSvbSHrHAQslfazovLnQ/mc2gdN5+6P45/k8fPgHrfHrYvJ4XvyK/S1A==