updated changelog with new release

Author: nkorinek

CHANGELOG.rst

@@ -9,6 +9,9 @@ The format is based on `Keep a Changelog <https://keepachangelog.com/en/1.0.0/>`
 Unreleased
 ----------
 
+0.1.3
+----------
+
 -  Changed how `assert_lines` checks the limits of lines (@nkorinek, #243)
 -  Changed changelog to an rst file. (@nkorinek, #266)
 -  Add a vignette for testing vector data plots. (@nkorinek, #208)