Upgraded KotlinDL version and refactor Titanic in IDEA example (#260)

* Added uncompiled version

* Set up the Java 11 for sources of this example due to the lowest JDK 11 in KotlinDL

examples/idea-examples/titanic/build.gradle.kts

@@ -12,13 +12,16 @@ application.mainClass.set("org.jetbrains.kotlinx.dataframe.examples.titanic.ml.T
 
 dependencies {
     implementation(project(":core"))
-    implementation("org.jetbrains.kotlinx:kotlin-deeplearning-api:0.4.0")
-    implementation("org.jetbrains.kotlinx:kotlin-deeplearning-dataset:0.4.0")
+    implementation("org.jetbrains.kotlinx:kotlin-deeplearning-api:0.5.1")
+    implementation("org.jetbrains.kotlinx:kotlin-deeplearning-impl:0.5.1")
+    implementation("org.jetbrains.kotlinx:kotlin-deeplearning-tensorflow:0.5.1")
+    implementation("org.jetbrains.kotlinx:kotlin-deeplearning-dataset:0.5.1")
 }
 
 // Make IDE aware of the generated code:
 kotlin.sourceSets.getByName("main").kotlin.srcDir("build/generated/ksp/main/kotlin/")
 
+
 dataframes {
     schema {
         data = "src/main/resources/titanic.csv"
@@ -28,3 +31,12 @@ dataframes {
         }
     }
 }
+
+tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
+    kotlinOptions.jvmTarget = "11"
+}
+
+tasks.withType<JavaCompile> {
+    sourceCompatibility = JavaVersion.VERSION_11.toString()
+    targetCompatibility = JavaVersion.VERSION_11.toString()
+}