chore(deps): Fix deprecation warnings for tempfile

src/fixture/dir.rs

@@ -217,7 +217,7 @@ impl TempDir {
     /// ```
     pub fn into_persistent(self) -> Self {
         let path = match self.temp {
-            Inner::Temp(temp) => temp.into_path(),
+            Inner::Temp(temp) => temp.keep(),
             Inner::Persisted(path) => path,
         };
         let temp = Inner::Persisted(path);

src/fixture/file.rs

@@ -138,7 +138,7 @@ impl NamedTempFile {
         let mut temp = Inner::Persisted;
         ::std::mem::swap(&mut self.temp, &mut temp);
         if let Inner::Temp(temp) = temp {
-            _ = temp.into_path();
+            _ = temp.keep();
         }
 
         self