Updating go version in travis.yaml

Author: mukhoakash

Diff for: release-tools/travis.yml

@@ -6,7 +6,7 @@ git:
   depth: false
 matrix:
   include:
-  - go: 1.13.3
+  - go: 1.18.4
 before_script:
 - mkdir -p bin
 - wget https://github.com/golang/dep/releases/download/v0.5.1/dep-linux-amd64 -O bin/dep