Update module oschwald/maxminddb-golang to v1

go.mod

go.sum

vendor/github.com/oschwald/maxminddb-golang/.gitignore

vendor/github.com/oschwald/maxminddb-golang/.gitmodules

vendor/github.com/oschwald/maxminddb-golang/.golangci.toml

vendor/github.com/oschwald/maxminddb-golang/.travis.yml

vendor/github.com/oschwald/maxminddb-golang/LICENSE

vendor/github.com/oschwald/maxminddb-golang/README.md

vendor/github.com/oschwald/maxminddb-golang/build.cmd

vendor/github.com/oschwald/maxminddb-golang/decoder.go

vendor/github.com/oschwald/maxminddb-golang/deserializer.go

vendor/github.com/oschwald/maxminddb-golang/errors.go

vendor/github.com/oschwald/maxminddb-golang/go.mod

vendor/github.com/oschwald/maxminddb-golang/go.sum

vendor/github.com/oschwald/maxminddb-golang/mmap_unix.go

vendor/github.com/oschwald/maxminddb-golang/mmap_windows.go

vendor/github.com/oschwald/maxminddb-golang/node.go

vendor/github.com/oschwald/maxminddb-golang/reader.go

.../github.com/oschwald/maxminddb-golang/reader_appengine.go

vendor/github.com/oschwald/maxminddb-golang/reader_other.go