Merge pull request #8991 from nextcloud/dependabot/gradle/kotlin_version-1.5.31

Bump kotlin_version from 1.4.32 to 1.5.31

build.gradle

@@ -9,7 +9,7 @@ import org.gradle.internal.jvm.Jvm
 // its root folder, another one for the app module in subfolder of root.
 
 buildscript {
-    ext.kotlin_version = '1.4.32'
+    ext.kotlin_version = '1.5.31'
     repositories {
         google()
         maven {
@@ -461,3 +461,7 @@ detekt {
 shot {
     showOnlyFailingTestsInReports = ciBuild
 }
+
+jacoco {
+    toolVersion = "0.8.7"
+}