v39 : Internal upgrade

This release has setting bug. Dont use if you are using ESP32

• CHANGE: CONFIG: Add SSD1306 / SH1106 switch
• CHANGE: HTTP: ESP32: Stop Async Web server. back to standard webserver to reduce code duplicate #42
• ADD: WiFi RSSI to JSON
• FIX: ST7789: T: header align

v38: moving to u8g2 release

From this release, release file is changed.

• CHANGE: CONFIG: ESP32 now uses SPIFFS instead of LITTLEFS but no format or setup required (remove LITTLEFS to SPIFFS wrapper because of compile error)
• CHANGE: SSD1306: Move to U8G2 graphic library
• CHANGE: SSD1306: Lux unit "lx" to "Lx" (1 and l is very similer griph)
• CHANGE: SSD1306: Draw wait for reconfigure bar using graphics
• CHANGE: ST7789: Draw wait for reconfigure bar using graphics
• BUGFIX: CONFIG: coution 2 High value is not saved. (due to insufficient buffer)

v37: Bugfix release

Bug fix relase for v3.6. v3.6 has some bugs.

Changed versioning

Versioning is changed from this version.
v37 is not typo.

Changelog

• BUGFIX: Alert settings are not propery saved.
• CHANGE: Switch to squix78 -> thingpulse (same library)
• CONFIG: Shorten JSON keys about alerts(reconfig required)

v3.6

Merge pull request #37 from yakumo-saki/20_alerting

20 alerting

v3.5

• Config: version 9 (was 8) and using JSON format
• Config: Migration between versions

v3.4

• Add brightness config
• Add Screen flip config

v3.3

• BUGFIX: MH-Z19B wrong message
• BUGFIX: Wrong uptime on JSON
• ADD: ST7789 Brightness change
• ADD: Watchdog timer (ESP32 only)
• CHANGE: Use TimerCall

v3.2

• ADD: I2C scan on startup.
• BUGFIX: ESP8266: I2C not working
• DROP: ESP8266: ST7789 is not supported (because of Pin config)

v3.1

• Add vertical display mode (ST7789)

v3.0

• Initial support for ST7789 (T-Display)