Bump deepdiver1975/tarstreamer to 2.1.0 in master

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

diff --git a/3rdparty b/3rdparty
index 1ff71da76e24d442afab28586072409ef3b9660e..fd8e55fb6ff4585e46cab3b381372639e73d5a4f 160000 (submodule)
--- a/3rdparty
+++ b/3rdparty
@@ -1 +1 @@
-Subproject commit 1ff71da76e24d442afab28586072409ef3b9660e
+Subproject commit fd8e55fb6ff4585e46cab3b381372639e73d5a4f