Removed:
 * `std.fs.updateFile`
 * `std.fs.updateFileMode`
 * `std.fs.copyFile`
 * `std.fs.copyFileMode`

Added:
 * `std.fs.Dir.copyFile`
 * `std.fs.copyFileAbsolute`
 * `std.fs.updateFileAbsolute`

Moved:
 * `std.fs.Dir.UpdateFileOptions` => `std.fs.CopyFileOptions`

Deprecated:
 * `std.fs.deleteDir`
 * `std.fs.deleteDirC`
 * `std.fs.deleteDirW`
 * `std.fs.readLink`
 * `std.fs.readLinkC`