feat(#939): try to use Program class to verify

pom.xml

@@ -120,6 +120,11 @@ SOFTWARE.
       <artifactId>jcabi-manifests</artifactId>
       <!-- version from parent POM -->
     </dependency>
+    <dependency>
+      <groupId>org.eolang</groupId>
+      <artifactId>lints</artifactId>
+      <version>0.0.21</version>
+    </dependency>
     <dependency>
       <groupId>org.cactoos</groupId>
       <artifactId>cactoos</artifactId>

src/main/java/org/eolang/jeo/representation/VerifiedEo.java

@@ -26,6 +26,10 @@
 import com.jcabi.xml.StrictXML;
 import com.jcabi.xml.XML;
 import com.jcabi.xml.XMLDocument;
+import java.io.IOException;
+import java.util.Collection;
+import org.eolang.lints.Defect;
+import org.eolang.lints.Program;
 import org.xembly.Directive;
 import org.xembly.ImpossibleModificationException;
 import org.xembly.Xembler;
@@ -58,7 +62,24 @@ final class VerifiedEo {
      */
     XML asXml() throws ImpossibleModificationException {
         final XML res = new XMLDocument(new Xembler(this.directives).xml());
-        new StrictXML(res).validate();
+        try {
+            final Collection<Defect> defects = new Program(
+                new StrictXML(res)
+            ).defects();
+            if (defects.size() > 0) {
+                throw new IllegalStateException(
+                    String.format(
+                        "EO is incorrect: %s",
+                        defects
+                    )
+                );
+            }
+        } catch (final IOException exception) {
+            throw new IllegalStateException(
+                "Failed to verify EO",
+                exception
+            );
+        }
         return res;
     }
 }