pkstrings: Allow consuming and converting to String

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

pkstrings/src/lib.rs

@@ -102,6 +102,12 @@ impl fmt::Display for Error {
 #[derive(Debug, Clone, Eq, PartialEq)]
 pub struct PKString(String);
 
+impl PKString {
+    pub fn into_string(self) -> String {
+        self.0
+    }
+}
+
 impl Deref for PKString {
     type Target = String;