Update platformio.ini

variants/m5stack_coreink/platformio.ini

@@ -12,7 +12,8 @@ build_flags =
 lib_deps = 
   ${esp32_base.lib_deps}
   zinggjm/GxEPD2@^1.4.9
-  lewisxhe/PCF8563_Library@^1.0.0
+#  lewisxhe/PCF8563_Library@^1.0.1 // switch to this one when it is released!
+  https://github.com/lewisxhe/PCF8563_Library.git#fe8cface109f63b5a4fb6abeaf87c6de0faa24c6
 board_build.f_cpu = 240000000L
 upload_protocol = esptool
 upload_port = /dev/ttyACM*