RDB Shredder: bump specs2-core to 2.3.13 (closes #3093)
RDB Shredder: bump specs2-core to 2.3.13 (closes #3093)

aldemirenes/snowplow,RetentionGrid/snowplow,Propertyfinder/snowplow,RetentionGrid/snowplow,acgray/snowplow,sspinc/snowplow,acgray/snowplow,sspinc/snowplow,aldemirenes/snowplow,liveintent-berlin/snowplow,snowplow/snowplow,liveintent-berlin/snowplow,liveintent-berlin/snowplow,sspinc/snowplow,sspinc/snowplow,RetentionGrid/snowplow,sspinc/snowplow,Propertyfinder/snowplow,liveintent-berlin/snowplow,snowplow/snowplow,acgray/snowplow,Propertyfinder/snowplow,liveintent-berlin/snowplow,acgray/snowplow,aldemirenes/snowplow,Propertyfinder/snowplow,aldemirenes/snowplow,snowplow/snowplow,Propertyfinder/snowplow,acgray/snowplow,Propertyfinder/snowplow,RetentionGrid/snowplow,RetentionGrid/snowplow,sspinc/snowplow,aldemirenes/snowplow,aldemirenes/snowplow,acgray/snowplow,liveintent-berlin/snowplow,snowplow/snowplow