Update dependency com.h2database:h2 to v2

Author: renovate[bot]

codegen-test/build.gradle

@@ -4,7 +4,7 @@ import org.seasar.doma.gradle.codegen.jdbc.SimpleDataSource
 
 buildscript {
     ext.domaVersion = '2.61.0'
-    ext.h2Version= '1.4.200'
+    ext.h2Version= '2.3.230'
     repositories {
         mavenCentral()
         mavenLocal()