update essentials to 3.1.0

Author: greenrobot

build.gradle

@@ -19,7 +19,7 @@ buildscript {
                 : 'unsupported'
         ob_native_dep = "io.objectbox:objectbox-$objectboxPlatform:$nativeVersion"
 
-        essentials_version = '3.0.0'
+        essentials_version = '3.1.0'
         junit_version = '4.13.1'
         mockito_version = '3.3.3'
         kotlin_version = '1.4.10'