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_entry_misc.3.txt

@@ -0,0 +1,36 @@
+ARCHIVE_ENTRY_MISC(3)	 BSD Library Functions Manual	 ARCHIVE_ENTRY_MISC(3)
+
+NAME
+     archive_entry_symlink_type, archive_entry_set_symlink_type — miscella‐
+     neous functions for manipulating properties of archive_entry
+
+LIBRARY
+     Streaming Archive Library (libarchive, -larchive)
+
+SYNOPSIS
+     #include <archive_entry.h>
+
+     int
+     archive_entry_symlink_type(struct archive_entry *a);
+
+     void
+     archive_entry_set_symlink_type(struct archive_entry *a, int);
+
+DESCRIPTION
+     The function archive_entry_symlink_type() returns and the function
+     archive_entry_set_symlink_type() sets the type of the symbolic link
+     stored in an archive entry.  These functions have special meaning on op‐
+     erating systems that support multiple symbolic link types (e.g. Microsoft
+     Windows).
+
+     Supported values are:
+     AE_SYMLINK_TYPE_UNDEFINED	Symbolic link target type is not defined (de‐
+				fault on unix systems)
+     AE_SYMLINK_TYPE_FILE	Symbolic link points to a file
+     AE_SYMLINK_TYPE_DIRECTORY	Symbolic link points to a directory
+
+SEE ALSO
+     archive_entry(3), archive_entry_paths(3), archive_entry_stat(3),
+     libarchive(3)
+
+BSD				April 15, 2019				   BSD