Update App Engine Go from 1.12 to 1.13

tnir · tnir · commit cb1c0ec69c12 · 2020-06-20T09:00:08.000Z
diff --git a/app.yaml b/app.yaml
@@ -1,4 +1,4 @@
-runtime: go112
+runtime: go113
 
 handlers:
 - url: /.*
