Update build.gradle.kts

charts/build.gradle.kts

@@ -19,8 +19,8 @@ android {
         targetSdkVersion(AndroidConstants.targetSdkVersion)
     }
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_1_8
-        targetCompatibility = JavaVersion.VERSION_1_8
+        sourceCompatibility = JavaVersion.VERSION_11
+        targetCompatibility = JavaVersion.VERSION_11
     }
     kotlinOptions {
         jvmTarget = "1.8"