Update module go-sql-driver/mysql to v1.5.0

go.mod

go.sum

vendor/github.com/go-sql-driver/mysql/.travis.yml

vendor/github.com/go-sql-driver/mysql/AUTHORS

vendor/github.com/go-sql-driver/mysql/CHANGELOG.md

vendor/github.com/go-sql-driver/mysql/CONTRIBUTING.md

vendor/github.com/go-sql-driver/mysql/README.md

vendor/github.com/go-sql-driver/mysql/auth.go

vendor/github.com/go-sql-driver/mysql/buffer.go

vendor/github.com/go-sql-driver/mysql/collations.go

vendor/github.com/go-sql-driver/mysql/conncheck.go

vendor/github.com/go-sql-driver/mysql/conncheck_dummy.go

vendor/github.com/go-sql-driver/mysql/connection.go

vendor/github.com/go-sql-driver/mysql/connection_go18.go

vendor/github.com/go-sql-driver/mysql/connector.go

vendor/github.com/go-sql-driver/mysql/driver.go

vendor/github.com/go-sql-driver/mysql/dsn.go

vendor/github.com/go-sql-driver/mysql/go.mod

vendor/github.com/go-sql-driver/mysql/nulltime.go

vendor/github.com/go-sql-driver/mysql/nulltime_go113.go