fix problem when "false" values where ignored

and set to default "true" by go-defaults
fixes mcuadros#135

add couple tests and improve error reporting when pulling error

try fetch `auth` for default docker registiry urls

update docker client and other dependencies

ci: remove Travis in favor of GitHub Actions

makefile, fix logger interface and travis

Merge branch 'master' of https://github.com/mcuadros/ofelia

local jobs

core: job-run pull image

core: Execution.skipped in core, middleware: fix overlap bahaviour

makefile: removing version from dir on packages