Make sourceMap optional for Foundry projects

Fixes #275 and #281

Author: medariox

crytic_compile/platform/foundry.py

@@ -142,10 +142,10 @@ def compile(self, crytic_compile: "CryticCompile", **kwargs: str) -> None:
                 ]["object"].replace("0x", "")
                 compilation_unit.srcmaps_init[contract_name] = target_loaded["bytecode"][
                     "sourceMap"
-                ].split(";")
+                ].split(";") if target_loaded["bytecode"].get("sourceMap") else []
                 compilation_unit.srcmaps_runtime[contract_name] = target_loaded["deployedBytecode"][
                     "sourceMap"
-                ].split(";")
+                ].split(";") if target_loaded["deployedBytecode"].get("sourceMap") else []
 
         version, optimized, runs = _get_config_info(self._target)