Dependencies: Update all dependencies (#738)

This PR:
- Bumps all the dependencies to the latest versions, except
`@openzeppelin/contracts`, which requires solc ^0.8.20. There's an
[option](https://hardhat.org/hardhat-runner/docs/advanced/multiple-solidity-versions)
to specify an `override` for `solc` compiler for particular files, but
there are too many (12+) and the config will get dirty.

Author: mmv08

contracts/test/ERC20Token.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: LGPL-3.0-only
-pragma solidity >=0.6.0 <0.8.0;
+pragma solidity >=0.7.0 <0.9.0;
 
 import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
 

contracts/test/TestImports.sol

@@ -5,4 +5,5 @@ pragma solidity >=0.7.0 <0.9.0;
 // Import the contract so hardhat compiles it, and we have the ABI available
 // solhint-disable-next-line no-unused-import
 import {MockContract} from "@safe-global/mock-contract/contracts/MockContract.sol";
+// solhint-disable-next-line no-unused-import
 import {UpgradeableProxy} from "@openzeppelin/contracts/proxy/UpgradeableProxy.sol";