Use a temp copy of the CVE cache to avoid altering repository files

for it/e3-core#32

tests/tests_e3/cve/cve_test.py

@@ -1,4 +1,5 @@
 from e3.cve import NVD
+from e3.fs import cp
 
 import os
 
@@ -8,7 +9,8 @@ def test_nvd_cve_search(socket_disabled):
     from requests_cache import NEVER_EXPIRE
     from warnings import catch_warnings, simplefilter as warn_filter
 
-    cache_db = os.path.join(os.path.dirname(__file__), "cache")
+    cache_db = os.path.join(os.getcwd(), "cache")
+    cp(os.path.join(os.path.dirname(__file__), "cache"), cache_db, recursive=True)
 
     with catch_warnings(record=True) as w:
         # Used to always trigger python warnings if they appear