Merge branch 'bugfix/fix_ci_release_branch' into 'master'

bugfix(ci): fix branch conflict with idf

See merge request sdk/ESP8266_RTOS_SDK!388

Merge branch 'feature/add_ci' into 'master'

Add ci script

See merge request sdk/ESP8266_RTOS_SDK!2

feat(version): Update version to 2.0.0

internal:006aaa45

fix(espnow): Fix wdt when call espnow delete

internal: e2365454

Version 1.4.0(cb4060d9)

1. fix a bug in wifi_send_pkt_freedom;
2. modify driver code due to _xt_isr_attach parameter changed;