move ethers to peer dependencies (#32)

.yarnrc

+ignore-scripts true

package.json

@@ -22,11 +22,6 @@
     "prepublishOnly": "tsdx build"
   },
   "dependencies": {
-    "@ethersproject/address": "^5.0.1",
-    "@ethersproject/contracts": "^5.0.1",
-    "@ethersproject/networks": "^5.0.1",
-    "@ethersproject/providers": "^5.0.4",
-    "@ethersproject/solidity": "^5.0.1",
     "@uniswap/v2-core": "^1.0.0",
     "big.js": "^5.2.2",
     "decimal.js-light": "^2.5.0",
@@ -35,7 +30,19 @@
     "tiny-warning": "^1.0.3",
     "toformat": "^2.0.0"
   },
+  "peerDependencies": {
+    "@ethersproject/address": "^5.0.0-beta",
+    "@ethersproject/contracts": "^5.0.0-beta",
+    "@ethersproject/networks": "^5.0.0-beta",
+    "@ethersproject/providers": "^5.0.0-beta",
+    "@ethersproject/solidity": "^5.0.0-beta"
+  },
   "devDependencies": {
+    "@ethersproject/address": "^5.0.2",
+    "@ethersproject/contracts": "^5.0.2",
+    "@ethersproject/networks": "^5.0.2",
+    "@ethersproject/providers": "^5.0.5",
+    "@ethersproject/solidity": "^5.0.2",
     "@types/big.js": "^4.0.5",
     "@types/jest": "^24.0.25",
     "babel-plugin-transform-jsbi-to-bigint": "^1.3.1",