Update SDFat to remove FatFile warnings

earlephilhower · earlephilhower · commit bb3df4547024 · 2019-07-13T20:30:34.000-07:00
diff --git a/libraries/ESP8266SdFat b/libraries/ESP8266SdFat
@@ -1 +1 @@
-Subproject commit 6326c71ff1f6294756b6e348edaf723bfe7be3e7
+Subproject commit 05fd2c86ad6493e99821cbd06a66fc05c5325ba8
