Update dependency com.jcabi:parent to v0.68.0

Author: renovate[bot]

pom.xml

@@ -33,7 +33,7 @@ OF THE POSSIBILITY OF SUCH DAMAGE.
   <parent>
     <groupId>com.jcabi</groupId>
     <artifactId>parent</artifactId>
-    <version>0.67.0</version>
+    <version>0.68.0</version>
   </parent>
   <groupId>co.stateful</groupId>
   <artifactId>java-sdk</artifactId>