Update hardhat dependencies and remove old solidity versions

README.md

@@ -12,6 +12,20 @@ From root directory:
 yarn install
 ```
 
+## Testing
+
+1. Start the nitro-testnode (you can find instructions [here](https://docs.arbitrum.io/run-arbitrum-node/run-local-full-chain-simulation)) with the following parameters:
+
+```shell
+./test-node.bash --init --tokenbridge --l3node --l3-token-bridge
+```
+
+2. Execute all tests with the following command
+
+```shell
+yarn run testAll
+```
+
 ## What's included?
 
 #### :white_check_mark: Basics

package.json

@@ -26,9 +26,9 @@
   },
   "dependencies": {
     "@arbitrum/sdk": "^4.0.1",
-    "@nomiclabs/hardhat-ethers": "^2.0.2",
-    "ethers": "^5.4.1",
-    "hardhat": "^2.2.0",
+    "@nomiclabs/hardhat-ethers": "^2.2.3",
+    "ethers": "^5.7.2",
+    "hardhat": "^2.13.1",
     "dotenv": "^16.4.5"
   },
   "workspaces": {

packages/arb-shared-dependencies/hardhat.config.js

@@ -6,22 +6,6 @@ module.exports = {
         version: '0.8.16',
         settings: {},
       },
-      {
-        version: '0.8.9',
-        settings: {},
-      },
-      {
-        version: '0.7.2',
-        settings: {},
-      },
-      {
-        version: '0.6.12',
-        settings: {},
-      },
-      {
-        version: '0.6.11',
-        settings: {},
-      },
     ],
   },
   networks: {