clang-format: set standard to 'Latest'

'Cpp11' is an alias for 'Latest', for historical reasons.

https://github.com/llvm/llvm-project/commit/e5032567903de19962333c4bf7d2edceaf4f9824#diff-b49a097415dff2837d9626d422c58ba8R82

This repository should tend towards using the latest C++ standard.
Set the C++ standard to Latest.  This is the desired behavior, what it is
really doing, and a clearer indication of the desired standard without
using the potentially confusing 'Cpp11' alias.

Signed-off-by: Brandon Wyman <bjwyman@gmail.com>
Change-Id: I6b9907320f206f4c6673d06b6206b6b0f9e446c9
diff --git a/.clang-format b/.clang-format
index 44865d0..7192e55 100644
--- a/.clang-format
+++ b/.clang-format
@@ -108,7 +108,7 @@
 SpacesInCStyleCastParentheses: false
 SpacesInParentheses: false
 SpacesInSquareBrackets: false
-Standard:        Cpp11
+Standard:        Latest
 TabWidth:        4
 UseTab:          Never
 ...