newer FastLED (v3.6.x / dev) creates compile errors on ESP32

[Klaus-Michael]

When trying to compile with vs Code and platformio I'm getting the following errors:

.pio/libdeps/astropixelsplus/FastLED/src/fl/isr.cpp: In function 'int fl::isr::attachTimerHandler(const fl::isr::isr_config_t&, fl::isr::isr_handle_t*)':
.pio/libdeps/astropixelsplus/FastLED/src/fl/isr.cpp:26:17: error: 'fl::isr::platform' has not been declared
     return isr::platform::attach_timer_handler(config, handle);
                 ^~~~~~~~
.pio/libdeps/astropixelsplus/FastLED/src/fl/isr.cpp: In function 'int fl::isr::attachExternalHandler(uint8_t, const fl::isr::isr_config_t&, fl::isr::isr_handle_t*)':
.pio/libdeps/astropixelsplus/FastLED/src/fl/isr.cpp:30:17: error: 'fl::isr::platform' has not been declared
     return isr::platform::attach_external_handler(pin, config, handle);
                 ^~~~~~~~
.pio/libdeps/astropixelsplus/FastLED/src/fl/isr.cpp: In function 'int fl::isr::detachHandler(fl::isr::isr_handle_t&)':
.pio/libdeps/astropixelsplus/FastLED/src/fl/isr.cpp:34:17: error: 'fl::isr::platform' has not been declared
     return isr::platform::detach_handler(handle);
                 ^~~~~~~~
.pio/libdeps/astropixelsplus/FastLED/src/fl/isr.cpp: In function 'int fl::isr::enableHandler(fl::isr::isr_handle_t&)':
.pio/libdeps/astropixelsplus/FastLED/src/fl/isr.cpp:38:17: error: 'fl::isr::platform' has not been declared
     return isr::platform::enable_handler(handle);

This seems to be an issue with the current FastLED (v3.6.x / dev) which seems to be missing some implementations for ESP32
Pinning FastLED to version 3.5.0 solves the issue.

replace
https://github.com/FastLED/FastLED
with
fastled/FastLED@3.5.0

in platformio.ini solves the issue for me

[rimim]

Thanks for the pull request. I'll leave this issue open in case some is not using platformio to build.