MAINTENANCE RELEASE
v1.1.2 changelog:
Updated espressif32 platform to Ver 5.2.0 (was 4.4.0).
Updated ESPAsyncWebServer to Ver 3.0.0 (was 2.1.0).
Updated ESPUI library to PR #199, release Oct-2022. Stored locally in project lib folder.
Changed all millis() related vars to unsigned long (was uint32).
Minor edits to readme doc files.