Support Go 1.18 and drop support for Go 1.16

Author: dhui

.github/workflows/ci.yaml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: ["1.16.x", "1.17.x"]
+        go: ["1.17.x", "1.18.x"]
     steps:
       - uses: actions/checkout@v2
 
@@ -63,7 +63,7 @@ jobs:
           ruby-version: 2.7
       - uses: actions/setup-go@v2
         with:
-          go-version: "1.17.x"
+          go-version: "1.18.x"
 
       - uses: docker/setup-qemu-action@v1
       - uses: docker/setup-buildx-action@v1

README.md

@@ -3,7 +3,7 @@
 [![Coverage Status](https://img.shields.io/coveralls/github/golang-migrate/migrate/master.svg)](https://coveralls.io/github/golang-migrate/migrate?branch=master)
 [![packagecloud.io](https://img.shields.io/badge/deb-packagecloud.io-844fec.svg)](https://packagecloud.io/golang-migrate/migrate?filter=debs)
 [![Docker Pulls](https://img.shields.io/docker/pulls/migrate/migrate.svg)](https://hub.docker.com/r/migrate/migrate/)
-![Supported Go Versions](https://img.shields.io/badge/Go-1.16%2C%201.17-lightgrey.svg)
+![Supported Go Versions](https://img.shields.io/badge/Go-1.17%2C%201.18-lightgrey.svg)
 [![GitHub Release](https://img.shields.io/github/release/golang-migrate/migrate.svg)](https://github.com/golang-migrate/migrate/releases)
 [![Go Report Card](https://goreportcard.com/badge/github.com/golang-migrate/migrate)](https://goreportcard.com/report/github.com/golang-migrate/migrate)