Merge branch 'feature/esptool_v2.8_v3.3' into 'release/v3.3'

esptool: Bump to v2.8 release (v3.3)

See merge request espressif/esp-idf!6461
This commit is contained in:
Jiang Jiang Jian
2019-10-25 11:37:08 +08:00