Bump bundled libarchive version to 3.5.2

- Update bunlded libarchive version used on Windows/Mac
- Enable requested zstd support while we are at it. Closes #211

dependencies/libarchive-3.5.2/doc/text/archive_read_new.3.txt

@@ -0,0 +1,27 @@
+ARCHIVE_READ_NEW(3)	 BSD Library Functions Manual	   ARCHIVE_READ_NEW(3)
+
+NAME
+     archive_read_new — functions for reading streaming archives
+
+LIBRARY
+     Streaming Archive Library (libarchive, -larchive)
+
+SYNOPSIS
+     #include <archive.h>
+
+     struct archive *
+     archive_read_new(void);
+
+DESCRIPTION
+     Allocates and initializes a struct archive object suitable for reading
+     from an archive.  NULL is returned on error.
+
+     A complete description of the struct archive object can be found in the
+     overview manual page for libarchive(3).
+
+SEE ALSO
+     tar(1), archive_read_data(3), archive_read_filter(3),
+     archive_read_format(3), archive_read_set_options(3), archive_util(3),
+     libarchive(3), tar(5)
+
+BSD			       February 2, 2012 			   BSD