Description of problem:
loudmouth-devel-1.5.3-9.el8 requires libidn-devel, which is not available in EPEL nor in RHEL BaseOS/AppStream.

```
Error: 
 Problem: conflicting requests
  - nothing provides libidn-devel needed by loudmouth-devel-1.5.3-9.el8.x86_64
(try to add '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)
```

Version-Release number of selected component (if applicable):
1.5.3-9.el8

How reproducible:
Very

Steps to Reproduce:
1. `# dnf install loudmouth-devel`


Actual results:
Error as mentioned above

Expected results:
No error

Additional info:
libidn2-devel is available on AppStream, but it doesn't have the same version as libidn from AppStream (former is 2.2.0 and the latter is 1.34)