-`wireguard_(preup|postdown|preup|predown)` settings are now a list. If more `iptables` commands needs to be specified e.g. then this changes makes it more readable. The commands are executed in order as described in [wg-quick.8](https://git.zx2c4.com/wireguard-tools/about/src/man/wg-quick.8). Also see README for more examples. (contribution by @Madic-)
- Allow to specifiy additional Wireguard interface options: `fwmark`, `mtu`, `table`, `preup` and `predown` (for more information and examples see [wg-quick.8](https://git.zx2c4.com/WireGuard/about/src/tools/man/wg-quick.8))
- While the changes introduced are backwards compatible in general if you stay with your current settings some variables are no longer needed. So this is partly a breaking change and therefore justifies a new major version.
- Support multiple Wireguard interfaces. See README for examples (contribution by fbourqui)
- Make role stateless: In the previous versions the private and public keys of the Wireguard hosts were stored locally in the directory defined with the `wireguard_cert_directory` variable. This is no longer the case. The variables `wireguard_cert_directory`, `wireguard_cert_owner` and `wireguard_cert_group` are no longer needed and were removed. If you used this role before this release it's safe to remove them from your settings. The directory that was defined with the `wireguard_cert_directory` variable will be kept. While not tested it may enable you to go back to an older version of this role and it should still work (contribution by fbourqui)
- Reminder: `wireguard_cert_directory` default was `~/wireguard/certs`. Public and Private keys where stored on the host running ansible playbook. As a security best practice private keys of all your WireGuard endpoints should not be kept locally.
- use correct semantic versioning as described in https://semver.org. Needed for Ansible Galaxy importer as it now insists on using semantic versioning.
- moved changelog entries to separate file
- make Ansible linter happy
- no major changes but decided to start a new major release as versioning scheme changed quite heavily
