Merge pull request #545 from crytic/improve-_convert_version

Improve handling of "version" string from Etherscan

Author: 0xalpharush

crytic_compile/platform/etherscan.py

@@ -474,7 +474,9 @@ def _convert_version(version: str) -> str:
     Returns:
         str: converted version
     """
-    return version[1 : version.find("+")]
+    if "+" in version:
+        return version[1 : version.find("+")]
+    return version[1:]
 
 
 def _sanitize_remappings(