Update the org.realityforge.braincheck dependency.

Author: realityforge

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ### Unreleased
 
-* Upgrade the `org.realityforge.braincheck` artifact to version `1.18.0`.
+* Upgrade the `org.realityforge.braincheck` artifact to version `1.19.0`.
 
 ### [v1.71](https://github.com/react4j/react4j-windowportal/tree/v1.71) (2019-06-03)
 [Full Changelog](https://github.com/react4j/react4j-windowportal/compare/v1.70...v1.71)

build.yaml

@@ -30,4 +30,4 @@ artifacts:
   arez_core: org.realityforge.arez:arez-core:jar:0.135
   arez_processor: org.realityforge.arez:arez-processor:jar:0.135
 
-  braincheck: org.realityforge.braincheck:braincheck:jar:1.18.0
+  braincheck: org.realityforge.braincheck:braincheck:jar:1.19.0