* fix(services): replicas numbers display is now correct with constraints and down nodes
* refactor(helpers): constraint helper has less complexity
* feat(services): constraints on node/engine labels are now supported
* refactor(helpers): ConstraintsHelper - remove regex patterns and improve code lisibility
* refactor(helpers): rework matchesConstraint() for better code lisibility and lodash find() instead for IE compatibility
* feat(services): add the ability to pull latest image when updating a service
* feat(services): update version header value
* refactor(services): remove TODO
* feat(services): rollback version header value to 1.29