Rollback to solc v0.8.7 for platform compatibility

nucypher/blockchain/eth/sol/__conf__.py

@@ -15,4 +15,4 @@ You should have received a copy of the GNU Affero General Public License
 along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 """
 
-SOLIDITY_COMPILER_VERSION = 'v0.8.10'
+SOLIDITY_COMPILER_VERSION = 'v0.8.7'

nucypher/blockchain/eth/sol/compile/config.py

@@ -47,7 +47,7 @@ WARNING: Do not change these values unless you know what you are doing.
 LANGUAGE: str = 'Solidity'
 
 # Version of the EVM to compile for. Affects type checking and code generation.
-EVM_VERSION: str = 'berlin'
+EVM_VERSION: str = 'london'
 
 # File level compiler outputs (needs empty string as contract name):
 FILE_OUTPUTS: List[str] = [
@@ -114,7 +114,12 @@ COMPILER_SETTINGS: Dict = dict(
     outputSelection={"*": {"*": CONTRACT_OUTPUTS, "": FILE_OUTPUTS}},  # all contacts(*), all files("")
 )
 
-REMAPPINGS: List = [CONTRACTS, ZEPPELIN, ARAGON, THRESHOLD]
+REMAPPINGS: List = [
+    CONTRACTS,
+    ZEPPELIN,
+    ARAGON,
+    THRESHOLD
+]
 
 # Base configuration for programmatic usage
 BASE_COMPILER_CONFIGURATION = CompilerConfiguration(

tests/contracts/contracts/StakingContractsTestSet.sol

@@ -268,7 +268,7 @@ contract SimpleStakingContract is AbstractStakingContract, Ownable {
 
 interface IExtendedStakingEscrow is IStakingEscrow {
     function deposit(address, uint256) external;
-    function withdraw(uint256) external;
+    function withdraw(uint256) external override;
 }
 
 /**