Fix ApeWorX/issues/155

Locks acquired by one user when downloading a compiler will prevent other users from doing the same, because the name of the lock file depends only on the solc version, but not on the user id, and the lock file is owned by the first user.

solcx/utils/lock.py

@@ -2,6 +2,7 @@
 import sys
 import tempfile
 import threading
+import getpass
 from pathlib import Path
 from typing import Any, Dict, Union
 
@@ -36,7 +37,7 @@ class _ProcessLock:
 
     def __init__(self, lock_id: str) -> None:
         self._lock = threading.Lock()
-        self._lock_path = Path(tempfile.gettempdir()).joinpath(f".solcx-lock-{lock_id}")
+        self._lock_path = Path(tempfile.gettempdir()).joinpath(f".solcx-lock-{getpass.getuser()}-{lock_id}")
         self._lock_file = self._lock_path.open("w")