Prefer latest toolchain-xtensa

[mcspr]

See esp8266/Arduino#8393

Missed when updating to Core 3.1.x b/c semver still prefers old version installed.
Fix optimisation bug(s). Usually breaks on Windows, comes and goes at random so it is pretty annoying to debug

May be related to #288, or any other 'this code sometimes works, but sometimes doesnt'

[valeros]

Hi @mcspr,

Missed when updating to Core 3.1.x b/c semver still prefers old version installed.

There is only one package v2.100300.220621 available at the moment, so when PlatformIO checks the ~2.100300.0 requirement it should download the latest package automatically, even if there is an old one installed in the system.

[mcspr]

Not unless updated manually, which may still pick up the old package

> cat platformio.ini
[env]
framework = arduino
platform = espressif8266@4.2.0

[env:d1_mini]
board = d1_mini

> pio run
Processing d1_mini (board: d1_mini; framework: arduino; platform: espressif8266@4.2.0)
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/espressif8266/d1_mini.html
PLATFORM: Espressif 8266 (4.2.0) > WeMos D1 R2 and mini
HARDWARE: ESP8266 80MHz, 80KB RAM, 4MB Flash
PACKAGES:
 - framework-arduinoespressif8266 @ 3.30102.0 (3.1.2)
 - tool-esptool @ 1.413.0 (4.13)
 - tool-esptoolpy @ 1.30000.201119 (3.0.0)
 - toolchain-xtensa @ 2.100300.210717 (10.3.0) <--- oops
...

[valeros]

Not unless updated manually, which may still pick up the old package

My bad, indeed it seems that PlatformIO won't update if not forced manually. Thanks for the PR, merged. A new release is coming shortly.