CHANGELOG.md in dxopal-1.5.1 vs CHANGELOG.md in dxopal-1.5.2

@@ -1,4 +1,9 @@
+## v1.5.2 (2020-12-29)
+
+- Upgrade opal to 1.0 (#37)
+- fix: `mouse_release?` returns wrong value (#44)
+
 ## v1.5.1 (2020-02-01)
 
 - fix: Image#[]= was broken since 1.4.0 (#35)
 
 ## v1.5.0 (2020-01-31)