remove solmate

we were only using the ERC20 implementation from it, and that could be
replaced by openzeppelin's

src/contracts/mocks/MockERC20.sol

@@ -1,15 +1,15 @@
 // SPDX-License-Identifier: GPL-3.0
 pragma solidity ^0.8.17;
 
-import {ERC20} from "solmate/src/tokens/ERC20.sol";
+import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
 import {CrucibleFactory} from "alchemist/contracts/crucible/CrucibleFactory.sol";
 
 contract MockERC20 is ERC20 {
     constructor(string memory name, string memory symbol)
-        ERC20(name, symbol, 18)
+        ERC20(name, symbol)
     {}
 
     function mint(address to, uint256 amount) public {
         _mint(to, amount);
     }
-}
+}

src/test/AludelFactory.t.sol

@@ -2,7 +2,7 @@
 // solhint-disable func-name-mixedcase
 pragma solidity ^0.8.17;
 
-import {ERC20} from "solmate/src/tokens/ERC20.sol";
+import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
 import {Vm} from "forge-std/Vm.sol";
 import {Test} from "forge-std/Test.sol";
 import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";

src/test/AludelFactoryIntegration.sol

@@ -3,7 +3,7 @@
 pragma solidity ^0.8.17;
 
 import {Test} from "forge-std/Test.sol";
-import {ERC20} from "solmate/src/tokens/ERC20.sol";
+import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
 import {Vm} from "forge-std/Vm.sol";
 import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
 

src/test/AludelV3.t.sol

@@ -3,7 +3,7 @@
 pragma solidity ^0.8.6;
 
 import {Test} from "forge-std/Test.sol";
-import {ERC20} from "solmate/src/tokens/ERC20.sol";
+import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
 import {Vm} from "forge-std/Vm.sol";
 import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
 

src/test/Utils.sol

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 pragma solidity ^0.8.10;
 
-import {ERC20} from "solmate/src/tokens/ERC20.sol";
+import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
 import {Vm} from "forge-std/Vm.sol";
 
 import {AludelFactory} from "../contracts/AludelFactory.sol";

yarn.lock

@@ -6027,10 +6027,6 @@ solidity-coverage@^0.8.2:
     shelljs "^0.8.3"
     web3-utils "^1.3.6"
 
-"solmate@https://github.com/transmissions11/solmate#3998897acb502fa7b480f505138a6ae1842e8d10":
-  version "6.6.2"
-  resolved "https://github.com/transmissions11/solmate#3998897acb502fa7b480f505138a6ae1842e8d10"
-
 source-map-support@^0.5.13:
   version "0.5.21"
   resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.21.tgz#04fe7c7f9e1ed2d662233c28cb2b35b9f63f6e4f"