Add .venv to .gitignore

Signed-off-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org>
diff --git a/.gitignore b/.gitignore
index 74574e2..1961ab0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
+*~
 *.pyc
 __pycache__
+.venv
 .idea
-*~