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_write_new.3.txt

@@ -0,0 +1,26 @@
+ARCHIVE_WRITE_NEW(3)	 BSD Library Functions Manual	  ARCHIVE_WRITE_NEW(3)
+
+NAME
+     archive_write_new — functions for creating archives
+
+LIBRARY
+     Streaming Archive Library (libarchive, -larchive)
+
+SYNOPSIS
+     #include <archive.h>
+
+     struct archive *
+     archive_write_new(void);
+
+DESCRIPTION
+     Allocates and initializes a struct archive object suitable for writing a
+     tar 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_write(3), archive_write_set_options(3), libarchive(3),
+     cpio(5), mtree(5), tar(5)
+
+BSD			       February 2, 2012 			   BSD