Support Go 1.16 and drop support or Go 1.14

.circleci/config.yml

@@ -4,7 +4,7 @@
 version: 2.1
 
 jobs:
-  "golang-1_14": &template
+  "golang-1_15": &template
     machine:
       # https://circleci.com/docs/2.0/configuration-reference/#available-machine-images
       image: ubuntu-2004:202010-01
@@ -18,7 +18,7 @@ jobs:
 
     environment:
       GO111MODULE: "on"
-      GO_VERSION: "1.14.x"
+      GO_VERSION: "1.15.x"
 
     steps:
       - run: curl -sL -o ~/bin/gimme https://raw.githubusercontent.com/travis-ci/gimme/master/gimme
@@ -39,15 +39,15 @@ jobs:
       - run: go get github.com/mattn/goveralls
       - run: goveralls -service=circle-ci -coverprofile coverage.txt
 
-  "golang-1_15":
+  "golang-1_16":
     <<: *template
     environment:
-      GO_VERSION: "1.15.x"
+      GO_VERSION: "1.16.x"
 
 
 workflows:
   version: 2
   build:
     jobs:
       - "golang-1_14"
-      - "golang-1_15"
+      - "golang-1_16"

README.md

@@ -1,6 +1,6 @@
 # dktest
 
-[![CircleCI - Build Status](https://img.shields.io/circleci/build/github/dhui/dktest/master)](https://circleci.com/gh/dhui/dktest) [![Coverage Status](https://img.shields.io/coveralls/github/dhui/dktest/master.svg)](https://coveralls.io/github/dhui/dktest?branch=master) [![GoDoc](https://godoc.org/github.com/dhui/dktest?status.svg)](https://godoc.org/github.com/dhui/dktest) [![Go Report Card](https://goreportcard.com/badge/github.com/dhui/dktest)](https://goreportcard.com/report/github.com/dhui/dktest) [![GitHub Release](https://img.shields.io/github/release/dhui/dktest/all.svg)](https://github.com/dhui/dktest/releases) ![Supported Go versions](https://img.shields.io/badge/Go-1.14%2C%201.15-lightgrey.svg)
+[![CircleCI - Build Status](https://img.shields.io/circleci/build/github/dhui/dktest/master)](https://circleci.com/gh/dhui/dktest) [![Coverage Status](https://img.shields.io/coveralls/github/dhui/dktest/master.svg)](https://coveralls.io/github/dhui/dktest?branch=master) [![GoDoc](https://godoc.org/github.com/dhui/dktest?status.svg)](https://godoc.org/github.com/dhui/dktest) [![Go Report Card](https://goreportcard.com/badge/github.com/dhui/dktest)](https://goreportcard.com/report/github.com/dhui/dktest) [![GitHub Release](https://img.shields.io/github/release/dhui/dktest/all.svg)](https://github.com/dhui/dktest/releases) ![Supported Go versions](https://img.shields.io/badge/Go-1.15%2C%201.16-lightgrey.svg)
 
 `dktest` is short for **d**oc**k**er**test**.