Update rxJava#208

Open

alejandroBrb wants to merge 2 commits intomcharmas:masterfrom

alejandroBrb:update-rxjava-3

Commits on Jun 24, 2021

refactor: upgrade rx2 to rx3, upgrade gradle plugin and add support to android x
alejandroBrb
committed

Commits on Jun 25, 2021

chore: validate global env var
alejandroBrb
committed