Update supported Ubuntu versions
Ubuntu 16.04 is no longer tested in the CI, but 20.04 is
Closes
@@ -9,8 +9,8 @@ if needed as a backup option (for example, if you don't have admin access).
Supported Ubuntu Linux platforms:
+* 20.04 (LTS)
* 18.04 (LTS)
-* 16.04 (LTS)
Bazel should be compatible with other Ubuntu releases and Debian
"stretch" and above, but is untested and not guaranteed to work.
