add hardhat + typescript to v1.2.0

.env.example

@@ -0,0 +1,2 @@
+FORK_RPC=
+DEV_PRIVATE_KEY=

hardhat.config.ts

@@ -0,0 +1,57 @@
+import "dotenv/config";
+import { HardhatUserConfig } from "hardhat/config";
+import "@nomiclabs/hardhat-waffle";
+import "@nomiclabs/hardhat-ethers";
+import "@openzeppelin/hardhat-upgrades";
+import "./tasks/accounts";
+import { parseEther } from "@ethersproject/units";
+
+// You need to export an object to set up your config
+// Go to https://hardhat.org/config/ to learn more
+
+/**
+ * @type import('hardhat/config').HardhatUserConfig
+ */
+const compilerSettings = {
+  metadata: {
+    // Not including the metadata hash
+    // https://github.com/paulrberg/solidity-template/issues/31
+    bytecodeHash: "none",
+  },
+  // You should disable the optimizer when debugging
+  // https://hardhat.org/hardhat-network/#solidity-optimizer-support
+  optimizer: {
+    enabled: true,
+    runs: 800,
+  },
+};
+const config: HardhatUserConfig = {
+  solidity: {
+    compilers: [
+      {
+        version: "0.6.12",
+        settings: compilerSettings,
+      },
+      {
+        version: "0.7.0",
+        settings: compilerSettings,
+      },
+    ],
+  },
+
+  networks: {
+    hardhat: {
+      forking: {
+        url: process.env.FORK_RPC!,
+      },
+      accounts: [
+        {
+          privateKey: process.env.DEV_PRIVATE_KEY!,
+          balance: parseEther("1000").toString(),
+        },
+      ],
+    },
+  },
+};
+
+export default config;