CHANGELOG.md: Add entry for PR #16

Signed-off-by: Andrew Gunnerson <[email protected]>

Author: chenxiaolong

CHANGELOG.md

@@ -1,6 +1,7 @@
 ### Unreleased
 
 * Update dependencies ([PR #15])
+* Fix panic when parsing nanosecond timestamp values >= 2^30 (536870912) due to incorrect mathematical order of operations ([Issue #13], [PR #16])
 
 ### Version 1.0.2
 
@@ -19,10 +20,12 @@
 
 [Issue #2]: https://github.com/chenxiaolong/afsr/issues/2
 [Issue #7]: https://github.com/chenxiaolong/afsr/issues/7
+[Issue #13]: https://github.com/chenxiaolong/afsr/issues/13
 [PR #5]: https://github.com/chenxiaolong/afsr/pull/5
 [PR #6]: https://github.com/chenxiaolong/afsr/pull/6
 [PR #8]: https://github.com/chenxiaolong/afsr/pull/8
 [PR #10]: https://github.com/chenxiaolong/afsr/pull/10
 [PR #11]: https://github.com/chenxiaolong/afsr/pull/11
 [PR #12]: https://github.com/chenxiaolong/afsr/pull/12
 [PR #15]: https://github.com/chenxiaolong/afsr/pull/15
+[PR #16]: https://github.com/chenxiaolong/afsr/pull/16