fix: export RawElement type (#461)

Author: tychoish

Diff for: src/raw/iter.rs

@@ -144,6 +144,7 @@ impl<'a> TryInto<Bson> for RawElement<'a> {
     }
 }
 
+#[allow(clippy::len_without_is_empty)]
 impl<'a> RawElement<'a> {
     pub fn len(&self) -> usize {
         self.size

Diff for: src/raw/mod.rs

@@ -142,7 +142,7 @@ pub use self::{
     document::RawDocument,
     document_buf::RawDocumentBuf,
     error::{Error, ErrorKind, Result, ValueAccessError, ValueAccessErrorKind, ValueAccessResult},
-    iter::RawIter,
+    iter::{RawElement, RawIter},
 };
 
 /// Special newtype name indicating that the type being (de)serialized is a raw BSON document.