chore(go): update to 1.13

Author: racevedoo

.circleci/config.yml

@@ -6,7 +6,7 @@ jobs:
   test:
     <<: *defaults
     docker:
-      - image: circleci/golang:1.12
+      - image: circleci/golang:1.13
       - image: confluentinc/cp-zookeeper:3.1.1
         environment:
           - ZOOKEEPER_CLIENT_PORT=2181
@@ -53,7 +53,7 @@ jobs:
   build-image:
     <<: *defaults
     docker:
-      - image: circleci/golang:1.12
+      - image: circleci/golang:1.13
     steps:
       - checkout
       - setup_remote_docker:

go.mod

@@ -1,6 +1,6 @@
 module github.com/inloco/kafka-elasticsearch-injector
 
-go 1.12
+go 1.13
 
 require (
 	github.com/Shopify/sarama v1.24.0