v1.5.0: Adds additional exclude filters and fixes some long standing bugs

Features:

• Adds config option host_nic_exclude_by_mac_list #280
• update Dockerfile to new ubuntu image and reduced size (@rizlas) #321
• Adds config option custom_attribute_exclude to exclude custom attribute label #317

Bugfixes:

• Fixes DNS Reverse Lookup Not Working #306
• Fixes issue with disable_vlan_sync and the same data was removed/added without changes #245
• Fixes issue with IP changes without any difference #275
• Fixes issue with empty vCenter tags #290
• Fixes issue where color of device role "Server" always was changed back #319
• bumps dependency 'requests' to version '2.31.0' due to security issue

Thanks to @rizlas and @muratbulat for the contributions and PRs.