Upgrade www/caddy from v0.11.1 to vO.11.5

Changelogs:

• https://github.com/mholt/caddy/releases/tag/v0.11.5
• https://github.com/mholt/caddy/releases/tag/v0.11.4
• https://github.com/mholt/caddy/releases/tag/v0.11.3
• https://github.com/mholt/caddy/releases/tag/v0.11.2

PR: 236834
Submitted by: Mohamed Akram <mohd.akram@outlook.com>
Approved by: Fabian Freyer <fabian.freyer@physik.tu-berlin.de> (maintainer)