v2.8.1 release

[crankyoldgit]

v2.8.1 (20220101)

[Bug Fixes]

• Arduino ESP32 Core v2.0.2+ crashes due to our timer hack. ([BUG] Arduino ESP32 Core v2.0.2+ crashes due to our timer hack. #1715 Crash with framework-arduinoespressif32 Version 2.0.2 #1713)
• SONY: Fix old Sony CD-Player Remote (12 Bit) (Fix old Sony CD-Player Remote (12 Bit) #1714)

[Features]

• Add tool to convert protocol & code to raw timing info. (Add tool to convert protocol & code to raw timing info. #1708 Raw information #1707 Generate raw data from hex code #1703)
• Add basic support for COOLIX48 protocol. (Add basic support for COOLIX48 protocol. #1697 Bosch AC Timer Captures #1694)
• MITSUBISHI_AC: Added support for i-SAVE mode. (MITSUBISHI_AC: Added support for i-SAVE mode. #1666)
• TOSHIBA_AC: Add Filter setting support. aka. Pure. (TOSHIBA_AC: Add Filter setting support. aka. Pure. #1693 Toshiba Heat Pump - Pure mode #1692)
• Airton: Add detailed A/C support. (Airton: Add detailed A/C support. #1688 Add support for Airton AC #1670)

[Misc]

• Add a structured library version number. (Add a structured library version number. #1717)
• Workflows Split UnitTests (Workflows Split UnitTests Tools to separate job #1712)
• Reduce time for workflow/Build (Reduce time for workflow/Build #1709)
• Fix some compiler & linter warnings (Reduce build warnings ( [-Wmissing-field-initializers] ) #1699 Reduce build warnings #1700)
• Fujitsu: Update supported A/C models (Fujitsu: Update supported devices #1690 Fujitsu AR-REB4E #1689 Fujitsu: Update supported A/C models #1702 Strange IR signals received from Fujitsu AC ASTG18K and ASTG09K #1701)
• Remove extra const qualifier for char pointer (Remove extra const qualifier for char pointer #1704)
• TCL: Update supported devices. (TCL: Update supported devices. #1698)
• ESP32-C3: Work around for some C3 specific compiler issues. (ESP32-C3: Work around for some C3 specific compiler issues. #1696 ESP32-C3 Support #1695)