Increase package version for release (#206)

CPBridge · Chris Bridge · web-flow · commit d36e2a50350f · 2022-11-09T13:42:14.000-05:00
Co-authored-by: Chris Bridge &lt;cbridge@partners.org&gt;
diff --git a/src/highdicom/version.py b/src/highdicom/version.py
@@ -1 +1 @@
-__version__ = '0.19.0'
+__version__ = '0.20.0'
