Update to LittleFS 2.1.3 (esp8266#6757)

earlephilhower · web-flow · commit d2d0ee3d4335 · 2019-11-12T19:55:50.000+01:00
diff --git a/libraries/LittleFS/lib/littlefs b/libraries/LittleFS/lib/littlefs
@@ -1 +1 @@
-Subproject commit abd90cb84c818a663b584575b019258d01d0065e
+Subproject commit 6b65737715039ef92d348014316b575b52547019
