Fix incorrectly implemented QualifiedScreamingSnakeCase
Fix incorrectly implemented QualifiedScreamingSnakeCase

This correctly converts `enum Foo { X }` to `FOO_X` instead of
the current `FOO_x` which is what currently happens.

eqrion/cbindgen,eqrion/cbindgen,eqrion/cbindgen,rlhunt/cbindgen,rlhunt/cbindgen