update content version in circleci config to "19.12.0"

skip instance stuff in circle config

Merge pull request demisto#4289 from demisto/lr-set-subtype

set subtype to python3

Update config.yml

Merge pull request demisto#4164 from demisto/19.8.1-fix-censys-bc-bre…

…akage

Update Censys.yml

Merge pull request demisto#4041 from demisto/19_8_0_fix_indicators_fr…

…om_ver

Revert "Fixed indicator fields structure (demisto#3936)"

improve misp integration descriptions (demisto#3905)

fix content descriptor

Update config.yml