Split CI requirements from user-level build_requirements.txt.
diff --git a/.gitignore b/.gitignore
index 7560064..edf39b6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -44,6 +44,7 @@
 
 # Pyenv files
 .python-version
+*.venv
 .venv
 
 # Android Studio / Gradle files