Update CHANGELOG.md

Author: os97673

CHANGELOG.md

@@ -1,8 +1,11 @@
+## [0.10.4](https://github.com/os97673/debase-ruby_core_source/compare/v0.10.3...v0.10.4)
+
+* ruby 2.6.0 added (contrinuted by [valich](https://github.com/valich))
+
 ## [0.10.3](https://github.com/os97673/debase-ruby_core_source/compare/v0.10.2...v0.10.3)
 
 * ruby 2.5.1 added (contrinuted by [niw](https://github.com/niw))
 
-
 ## [0.10.2](https://github.com/os97673/debase-ruby_core_source/compare/v0.10.1...v0.10.2)
 
 * ruby 2.5.0 added