changelog: Add entry for ID3v2 timestamps

CHANGELOG.md

@@ -7,9 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Added
-- **Tag**: Support `ItemKey::ParentalAdvisory` for `Ilst` and `Id3v2Tag` ([issue](https://github.com/Serial-ATA/lofty-rs/issues/99)) ([PR](https://github.com/Serial-ATA/lofty-rs/pull/388))
-  - This will allow for generic edits to the iTunes-style parental advisory tag. Note that this will use the
-    numeric representation. For more information, see: https://docs.mp3tag.de/mapping/#itunesadvisory.
+- **Tag**:
+  - Support `ItemKey::ParentalAdvisory` for `Ilst` and `Id3v2Tag` ([issue](https://github.com/Serial-ATA/lofty-rs/issues/99)) ([PR](https://github.com/Serial-ATA/lofty-rs/pull/388))
+    - This will allow for generic edits to the iTunes-style parental advisory tag. Note that this will use the
+      numeric representation. For more information, see: https://docs.mp3tag.de/mapping/#itunesadvisory.
+  - New `tag::items` module for generic representations of complex tag items
+  - New **Timestamp** item for ISO 8601 timestamps ([PR](https://github.com/Serial-ATA/lofty-rs/pull/389))
+- **ID3v2**: Special handling for frames with timestamps with `FrameValue::Timestamp` ([PR](https://github.com/Serial-ATA/lofty-rs/pull/389))
 
 ### Changed
 - **VorbisComments**/**ApeTag**: Verify contents of `ItemKey::FlagCompilation` during `Tag` merge ([PR](https://github.com/Serial-ATA/lofty-rs/pull/387))

lofty/src/id3/v2/tag.rs

@@ -19,6 +19,7 @@ use crate::id3::v2::util::pairs::{
 use crate::id3::v2::{KeyValueFrame, TimestampFrame};
 use crate::mp4::AdvisoryRating;
 use crate::picture::{Picture, PictureType, TOMBSTONE_PICTURE};
+use crate::tag::items::Timestamp;
 use crate::tag::{
 	try_parse_year, Accessor, ItemKey, ItemValue, MergeTag, SplitTag, Tag, TagExt, TagItem, TagType,
 };
@@ -31,7 +32,6 @@ use std::io::{Cursor, Write};
 use std::ops::Deref;
 use std::str::FromStr;
 
-use crate::tag::items::Timestamp;
 use lofty_attr::tag;
 
 const USER_DEFINED_TEXT_FRAME_ID: &str = "TXXX";

lofty/src/tag/items/timestamp.rs

@@ -1,11 +1,11 @@
 use crate::config::ParsingMode;
 use crate::error::{ErrorKind, LoftyError, Result};
+use crate::macros::err;
 
 use std::fmt::Display;
 use std::io::Read;
 use std::str::FromStr;
 
-use crate::macros::err;
 use byteorder::ReadBytesExt;
 
 /// A subset of the ISO 8601 timestamp format