Minor

slither/detectors/attributes/incorrect_solc.py

@@ -30,7 +30,7 @@ class IncorrectSolc(AbstractDetector):
     LESS_THAN = "it uses lesser than"
 
     # Indicates the allowed versions.
-    ALLOWED_VERSIONS = ["0.4.25", "0.5.2", "0.5.3"]
+    ALLOWED_VERSIONS = ["0.4.24", "0.4.25", "0.5.2", "0.5.3"]
 
     def _check_version(self, version):
         op = version[0]

tests/solc_version_incorrect.sol

@@ -1,6 +1,5 @@
 // The version pragma below should get flagged by the detector
-// Reason: The expression "^0.4.0 >0.4.2" allows old solc (<0.4.23)
+pragma solidity ^0.4.23; 
-pragma solidity ^0.4.24; 
 pragma solidity >=0.4.0 <0.6.0;
 contract Contract{