Update org.junit.jupiter to v5.12.0 (#253)

* Update org.junit.jupiter to v5.12.0

* Update JUnit dependencies to use BOM for version alignment

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Toshihiro Nakamura <[email protected]>

Author: renovate[bot]

build.gradle.kts

@@ -41,8 +41,10 @@ subprojects {
         implementation("org.seasar.doma:doma-slf4j:${domaVersion}")
         runtimeOnly("ch.qos.logback:logback-classic:1.5.16")
         runtimeOnly("com.h2database:h2:2.3.232")
-        testImplementation("org.junit.jupiter:junit-jupiter-api:5.11.4")
-        testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.11.4")
+        testImplementation(platform("org.junit:junit-bom:5.12.0"))
+        testImplementation("org.junit.jupiter:junit-jupiter-api")
+        testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine")
+        testRuntimeOnly("org.junit.platform:junit-platform-launcher")
     }
 
     eclipse {