Update SKP version

Automatic commit by the RecreateSKPs bot.

TBR=

Review URL: https://codereview.chromium.org/688793003
diff --git a/SKP_VERSION b/SKP_VERSION
index 0973804..b5db9c4 100644
--- a/SKP_VERSION
+++ b/SKP_VERSION
@@ -1 +1 @@
-137
\ No newline at end of file
+139
\ No newline at end of file