Relax development virtualenv dependency versioning (#6897)

groszewn · web-flow · commit e4750019abb3 · 2024-08-14T13:44:01.000-04:00
We're seeing issues when trying to build our wheels which resolve when
upgrading to a newer virtualenv version.
diff --git a/tensorboard/pip_package/requirements_dev.txt b/tensorboard/pip_package/requirements_dev.txt
@@ -30,4 +30,4 @@ flake8==3.7.8
 yamllint==1.17.0
 
 # For building Pip package
-virtualenv==20.0.31
+virtualenv
