build: Add support for Java 16

This pull request adds support for building OpenDC using Java 16. 

To make this possible, we have upgraded the following dependencies:
- Kotlin from 1.4.3 to 1.5.0
- Jacoco from 0.8.6 to 0.8.7
- Gradle from 7.0 to 7.0.2

1 files changed, 1 insertions, 1 deletions

diff --git a/opendc-compute/opendc-compute-service/src/main/kotlin/org/opendc/compute/service/scheduler/FilterScheduler.kt b/opendc-compute/opendc-compute-service/src/main/kotlin/org/opendc/compute/service/scheduler/FilterScheduler.kt
index 0fd5b2a4..1fe90454 100644
--- a/opendc-compute/opendc-compute-service/src/main/kotlin/org/opendc/compute/service/scheduler/FilterScheduler.kt
+++ b/opendc-compute/opendc-compute-service/src/main/kotlin/org/opendc/compute/service/scheduler/FilterScheduler.kt
@@ -59,7 +59,7 @@ public class FilterScheduler(private val filters: List<HostFilter>, private val
                 true
             }
             .sortedByDescending { host ->
-                weighers.sumByDouble { (weigher, factor) -> weigher.getWeight(host, server) * factor }
+                weighers.sumOf { (weigher, factor) -> weigher.getWeight(host, server) * factor }
             }
             .firstOrNull()
     }