SLING-7423 Upgrade Oak to 1.8

use Oak 1.8.2
diff --git a/pom.xml b/pom.xml
index 26c347c..1e021a7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -42,7 +42,7 @@
 
   <properties>
     <jackrabbit.version>2.16.0</jackrabbit.version>
-    <oak.version>1.8.1</oak.version>
+    <oak.version>1.8.2</oak.version>
     <org.ops4j.pax.exam.version>4.11.0</org.ops4j.pax.exam.version>
   </properties>