1.3.0 - fix compatibility with AceTime v2.3.0; update supported boards

• 1.3.0 (2023-07-20)
  • Replace call to Epoch::daysToCurrentEpochFromConverterEpoch() with
    Epoch::daysToCurrentEpochFromInternalEpoch(), to be consistent with
    AceTime v2.3.0.
    • This an internal implementation detail, it should not cause an API
      breakage.
  • Upgrade tool chain
    • Upgrade Arduino CLI to 0.33.0.
    • Upgrade Arduino AVR Core to 1.8.6.
    • Upgrade STM32 Core to 2.6.0.
    • Upgrade ESP32 Core to 2.0.9.
    • Upgrade Teensyduino from 1.56 to 1.57.
  • Update supported boards and tiers
    • Add SAMD21 and SAMD51 boards to Tier 1
      • Add 2 SAMD boards from 2 different companies, to test their
        Arduino Board software:
        • Seeeduino XIAO M0 (SAMD21 48MHz ARM Cortex-M0+)
        • Adafruit ItsyBitsy M4 (SAMD51 120MHz ARM Cortex-M4)
      • SAMD21 and SAMD51 boards are back in Tier 1, as long as they use
        the traditional Arduino API instead of the new
        ArduinoCore-api.
      • Fortunately most third party SAMD21 and SAMD51 boards continue to
        use the traditional Arduino API.
    • Move Teensy 3.2 to Tier 2 ("Should work but not tested often")
      • This board is entering end-of-life.
      • As well, the Teensyduino environment integrates with the Arduino
        IDE and CLI in a way that's different than all other third-party
        Arduino boards. Some of my automation scripts do not work with
        Teensyduino, so it becomes very time consuming to test the Teensy
        boards.
      • All Teensy boards are now in Tier 2 .

1.2.4 - fix SystemClockCoroutine; re-add SAMD21; upgrade to AceTime 2.2.1

• 1.2.4 (2023-03-26)
  • Bug Fix: Fix incorrect template parameter in the definition
    of SystemClockCoroutine which prevented it from being executed by
    the CoroutineScheduler::loop().
  • Upgrade to AceTime v2.2.1.
  • Re-add support for SAMD21 using the Seeed Studio XIAO.

1.2.3 - eliminate requirement for EpoxyMockSTM32RTC in Makefiles under EpoxyDuino

• v1.2.3 (2022-11-16)
  • When compiled under EpoxyDuino, implement stubs directly in
    ace_time/hw/StmRtc.cpp instead of relying on the STM32RTC.{h,cpp} from
    the EpoxyMockSTM32RTC library which mocks out the real STM32RTC library.
    • Eliminates the need to include EpoxyMockSTM32RTC in various
      downstream Makefile when using EpoxyDuino.

1.2.2 - fix NptClock to handle NTP epoch rollover in 2036 and the adjustable epoch of AceTime v2.0

• v1.2.2 (2022-11-08)
  • Fix NtpClock to handle the uint32_t overflow of NTP seconds, with the
    first one occuring just after 2036-02-07 06:28:15 UTC.
  • Review and document the range of validity of the getNow() seconds of
    various Clock classes. See Bugs and Limitations.
  • Update various sections of README.md to account for the change of AceTime
    epoch from 2000-01-01 (v1) to 2050-01-01 (v2).
  • Upgrade tool chains
    • Arduino CLI from 0.27.1
    • STM32duino from 2.3.0
    • AVR Core from 1.8.4 to 1.8.5
    • ESP32 Core from 2.0.2 to 2.0.5
    • Teensyduino from 1.56 to 1.57

1.2.1 - fix compiler error; add ESP8266 examples to GitHub actions

• v1.2.1 (2022-11-06)
  • Fix incorrect reference to
    LocalDate::secondsToCurrentEpochFromUnixEpoch64 instead of
    Epoch::secondsToCurrentEpochFromUnixEpoch64.
  • Enable GitHub Actions for ESP8266 examples (HelloEspSntpClock,
    HelloNtpClock, HelloNtpClockLazy) to catch compiler errors.
    • Depends on EpoxyDuino v1.4.0, and hsaturn/EspMock v0.1.

support AceTime v2.0.0

• v1.2.0 (2022-11-04)
  • Replace LocalDate::kEpochYear with HardwareDateTime::kBaseYear
    since AceTime current epoch is no longer a constant and AceTime no longer
    uses a 2-digit year offset internally.
  • Replace LocalDate::kSecondsSinceUnixEpoch with
    Epoch::secondsToCurrentEpochFromUnixEpoch64() since AceTime current
    epoch is no longer constant.
  • There should be no visible breakage of the client-facing API.

v1.1.0 - simplify StmRtcClock; upgrade tool chains; refactor NtpClock and EspSntpClock for consistency

• v1.1.0 (2022-03-28)
  • Simplify StmRtcClock and StmRtc classes to use
    STM32RTC::getInstance() directly.
    • Move configuration of the STM32RTC singleton to the STM32RTC
      object itself (e.g. configuring LSE_CLOCK, HSE_CLOCK).
    • Update README.md documentation to
      indicate that STM32RTC v1.2.0 fixes the bug which caused the date
      components to be lost upon power reset.
  • Incorporate EpoxyMockSTM32RTC mock library from EpoxyDuino to allow
    StmRtcClock to be compiled in GitHub Actions.
  • Add benchmarks for StmRtcClock, Stm32F1Clock, NtpClock, and
    EspSntpClock into MemoryBenchmark.
  • Simplify and refactor NTP examples to be more consistent.
    • examples/HelloNtpClock
    • examples/HelloNtpClockLazy
    • examples/HelloEspSntpClock
  • Upgrade tool chains
    • Arduino IDE from 1.8.16 to 1.8.19
    • Arduino CLI from 0.19.2 to 0.20.2
    • STM32duino from 2.0.0 to 2.2.0
    • AVR Core from 1.8.3 to 1.8.4
    • ESP32 Core from 1.0.6 to 2.0.2
    • Teensyduino from 1.55 to 1.56

v1.0.5 - update CoroutineTemplate usage for compatibility with AceRoutine v1.5.0

• v1.0.5 (2022-03-25)
  • Add a uint16_t template parameter to CoroutineTemplate for
    compatibility with AceRoutine v1.5.0.

v1.0.4 - add EspSntpClock to expose SNTP and time() on ESP8266 and ESP32 platforms

• v1.0.4 (2022-01-18)
  • Add EspSntpClock class which configures the SNTP client on the ESP8266
    and ESP32 platforms, sets the configTime() timezone to UTC, and exposes
    the time() function through the Clock interface.

v1.0.3 - add AceSorting dependency triggered by AceTime v1.9.0

• v1.0.3 (2021-12-02)
  • Add AceSorting library to various Makefiles, a new dependency for
    AceTime v1.9.0.
  • Adding accidentally missing Baseline line in MemoryBenchmark.