build: remove tracked generated .sls files and ignore them

ober

a4e218e3db85f45dd04fd8c587011f4e454618f5

diff --git a/.gitignore b/.gitignore
index 43ae15f..e63d98d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@
 !.jerboa/security.json
 dist/
 tests/tmp/
+lib/