Upgrade to a new Bazel version

This one has better performance and various new features. It also
prevents us from falling too far behind upstream.

Change-Id: I3b8e1c5bda886ea2e990523af9e6de2434c784be
diff --git a/third_party/seasocks/BUILD b/third_party/seasocks/BUILD
index d85e3c3..0daf8ea 100644
--- a/third_party/seasocks/BUILD
+++ b/third_party/seasocks/BUILD
@@ -6,7 +6,7 @@
   srcs = glob(['src/main/c/**/*.cpp']),
   hdrs = glob([
     'src/main/c/**/*.h',
-  ], [
+  ], exclude=[
     'src/main/internal/**/*',
   ]),
   includes = ['src/main/c'],