chore(deps): bump github.com/go-sql-driver/mysql from 1.7.1 to 1.8.1

Bumps [github.com/go-sql-driver/mysql](https://github.com/go-sql-driver/mysql) from 1.7.1 to 1.8.1.
- [Release notes](https://github.com/go-sql-driver/mysql/releases)
- [Changelog](https://github.com/go-sql-driver/mysql/blob/v1.8.1/CHANGELOG.md)
- [Commits](go-sql-driver/mysql@v1.7.1...v1.8.1)

---
updated-dependencies:
- dependency-name: github.com/go-sql-driver/mysql
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -3,7 +3,7 @@ module github.com/ggicci/distlock
 go 1.14
 
 require (
-	github.com/go-sql-driver/mysql v1.7.1
+	github.com/go-sql-driver/mysql v1.8.1
 	github.com/gomodule/redigo v1.8.6
 	github.com/lib/pq v1.10.9
 	github.com/stretchr/testify v1.8.4

go.sum

@@ -1,8 +1,10 @@
+filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
+filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/go-sql-driver/mysql v1.7.1 h1:lUIinVbN1DY0xBg0eMOzmmtGoHwWBbvnWubQUrtU8EI=
-github.com/go-sql-driver/mysql v1.7.1/go.mod h1:OXbVy3sEdcQ2Doequ6Z5BW6fXNQTmx+9S1MCJN5yJMI=
+github.com/go-sql-driver/mysql v1.8.1 h1:LedoTUt/eveggdHS9qUFC1EFSa8bU2+1pZjSRpvNJ1Y=
+github.com/go-sql-driver/mysql v1.8.1/go.mod h1:wEBSXgmK//2ZFJyE+qWnIsVGmvmEKlqwuVSjsCm7DZg=
 github.com/gomodule/redigo v1.8.6 h1:h7kHSqUl2kxeaQtVslsfUCPJ1oz2pxcyzLy4zezIzPw=
 github.com/gomodule/redigo v1.8.6/go.mod h1:P9dn9mFrCBvWhGE1wpxx6fgq7BAeLBk+UUUzlpkBYO0=
 github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=