Campaign Manager 1.4.0

Campaign Manager up to versions in the 1.3 branch is incompatible with CiviCRM Core 5.63.0 and up.
Starting with CiviCRM Core version 5.63.0, Campaign Manager had an incompatibility due to namespace conflicts with a new Core extension for campaign-related code. See #111 for more information. This release fixes this incompatibility and is thus compatible with all CiviCRM Core versions.

Changes since Campaign Manager 1.3

• [098e27a] Fix checking of cycles of campaigns in the tree view - by @jensschuppe
• [#111] Rename CRM\Campaign namespace to avoid collisions with new Core extension - by @jensschuppe, @jofranz, @sluc23, @bjendres