Bump rules_apple version to 0.5.0.

PiperOrigin-RevId: 195163240

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index 845392a..a5e6fca 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -7,7 +7,7 @@
 git_repository(
     name = "build_bazel_rules_apple",
     remote = "https://github.com/bazelbuild/rules_apple.git",
-    tag = "0.4.0",
+    tag = "0.5.0",
 )
 
 http_file(