1.3.0 * The methods on the `maxminddb.Reader` struct now return an error if called on a closed database reader. Previously, this could cause a segmentation violation when using a memory-mapped file. * The `Close` method on the `maxminddb.Reader` struct now sets the underlying buffer to nil, even when using `FromBytes` or `Open` on Google App Engine. * No longer uses constants from `syscall`