Updates the version of golang

Author: haroon-sheikh

.circleci/config.yml

@@ -2,7 +2,7 @@ version: 2
 jobs:
   build:
     docker:
-      - image: circleci/golang:1.15
+      - image: circleci/golang:1.13
     working_directory: /go/src/github.com/sitture/gauge-reportserver
     steps:
       - checkout
@@ -17,7 +17,7 @@ jobs:
           command: go run build/make.go --all-platforms
   deploy:
     docker:
-      - image: circleci/golang:1.15
+      - image: circleci/golang:1.13
     working_directory: /go/src/github.com/sitture/gauge-reportserver
     steps:
       - checkout

go.mod

@@ -1,6 +1,6 @@
 module github.com/sitture/gauge-reportserver
 
-go 1.15
+go 1.13
 
 require (
 	github.com/getgauge/common v0.0.0-20200824023809-24587c106922