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-simulator/opendc-simulator-compute/src/main/kotlin/org/opendc/simulator/compute/SimAbstractMachine.kt b/opendc-simulator/opendc-simulator-compute/src/main/kotlin/org/opendc/simulator/compute/SimAbstractMachine.kt
index f6324e13..e501033a 100644
--- a/opendc-simulator/opendc-simulator-compute/src/main/kotlin/org/opendc/simulator/compute/SimAbstractMachine.kt
+++ b/opendc-simulator/opendc-simulator-compute/src/main/kotlin/org/opendc/simulator/compute/SimAbstractMachine.kt
@@ -80,7 +80,7 @@ public abstract class SimAbstractMachine(private val clock: Clock) : SimMachine
     override suspend fun run(workload: SimWorkload, meta: Map<String, Any>): Unit = withContext(context) {
         require(!isTerminated) { "Machine is terminated" }
         val ctx = Context(meta)
-        val totalCapacity = model.cpus.sumByDouble { it.frequency }
+        val totalCapacity = model.cpus.sumOf { it.frequency }
 
         _speed = DoubleArray(model.cpus.size) { 0.0 }
         var totalSpeed = 0.0