Update gradle.properties version number to 0.12.0

Jolanrensen · web-flow · commit 80c1aa56e84f · 2023-06-27T12:15:33.000+02:00
Final step for the release as suggested by #416
diff --git a/gradle.properties b/gradle.properties
@@ -1,5 +1,5 @@
 projectName=dataframe
-version=0.11.0
+version=0.12.0
 jupyterApiTCRepo=
 kotlin.jupyter.add.scanner=false
 org.gradle.jvmargs=-Xmx4G
