@keyframe identifiers are minified

[bryanforbes]

Bug

Package Version: 3.0.0

Code

@keyframes fadeIn {
   // ...
}

Expected behavior:

The task postcss:modules-dev transforms the above code to:

@keyframes filename__fadeIn__hash {
   // ...
}

Actual behavior:

The above code is transformed to:

@keyframes a {
    // ...
}

This causes @keyframes to overwrite each other.