Add ext_monitor gem to improve Monitor class's operations#2670

Merged

ganmacs merged 2 commits intofluent:masterfrom ganmacs:add-ext_monintor

Jan 9, 2020

+34-8

Commits on Jan 6, 2020

Add ext_monitor for ruby 2.3 or later
ganmacs
committed

Commits on Jan 8, 2020

use ext_monitor before ruby 2.7
ganmacs
committed