go version updated from 1.12.1 to 1.13

Change-Id: I81e4708d8d221cc6854fd6c90d045639aadf6e35
Signed-off-by: rangajal <ranjit.angajala@nokia.com>
diff --git a/RELNOTES b/RELNOTES
index bfc5a93..9e7ed4d 100644
--- a/RELNOTES
+++ b/RELNOTES
@@ -1,3 +1,6 @@
+### v0.7.7
+* go.mod updated from 1.12 go version to 1.13
+
 ### v0.7.6
 * Upgraded to RMR 4.7.4 and some improvements