The way the binary is currently built doesn't include the version
number.
This means that `terraform --version` doesn't pick up the version
```shell
$ terraform --version [130]
Terraform v0.12.24
+ provider.unifi (unversioned)
```
Adding the binary name in line with
https://www.terraform.io/docs/configuration/providers.html#plugin-names-and-versions
will let it show up correctly.