fix migrations

packages/protocol/test-sol/precompiles/EpochSizePrecompile.sol

@@ -1,21 +1,25 @@
-// TODO move this to test folder
 pragma solidity >=0.8.7 <0.8.20;
 
 address constant EPOCH_SIZEPRE_COMPILE_ADDRESS = address(0xff - 7);
-
 contract EpochSizePrecompile {
   address constant ADDRESS = EPOCH_SIZEPRE_COMPILE_ADDRESS;
 
-  uint256 public EPOCH_SIZE = 100;
+  uint256 public constant EPOCH_SIZE = 100;
+  uint256 public epochSizeSet;
 
   receive() external payable {}
 
   fallback(bytes calldata) external payable returns (bytes memory) {
+    // this is required  because when the migrations deploy the precompiles
+    // they don't get constructed
+    if (epochSizeSet != 0) {
+      return abi.encodePacked(epochSizeSet);
+    }
     return abi.encodePacked(EPOCH_SIZE);
   }
 
   function setEpochSize(uint256 epochSize) public {
-    EPOCH_SIZE = epochSize;
+    epochSizeSet = epochSize;
   }
 
   function getAddress() public pure returns (address) {

packages/protocol/test-sol/unit/common/EpochManagerEnabler.t.sol

@@ -2,11 +2,8 @@
 pragma solidity >=0.8.7 <0.8.20;
 
 import "celo-foundry-8/Test.sol";
-
 import "@celo-contracts-8/common/EpochManagerEnabler.sol";
-
 import "@celo-contracts/stability/test/MockSortedOracles.sol";
-
 import "@celo-contracts/common/interfaces/IRegistry.sol";
 
 import { EPOCH_SIZEPRE_COMPILE_ADDRESS, EpochSizePrecompile } from "@test-sol/precompiles/EpochSizePrecompile.sol";