dependency: bump assertj-core from 3.19.0 to 3.23.1 in /sevntu-checks

Bumps [assertj-core](https://github.com/assertj/assertj-core) from
3.19.0 to 3.23.1.
- [Release notes](https://github.com/assertj/assertj-core/releases)
- [Commits](assertj/assertj@assertj-core-3.19.0...assertj-core-3.23.1)

---
updated-dependencies:
- dependency-name: org.assertj:assertj-core
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

sevntu-checks/pom.xml

@@ -29,7 +29,7 @@
     <pmd.version>6.38.0</pmd.version>
     <java.version>11</java.version>
     <junit.version>5.8.0</junit.version>
-    <assertj.version>3.19.0</assertj.version>
+    <assertj.version>3.23.1</assertj.version>
     <truth.version>1.1.2</truth.version>
   </properties>
 

sevntu-checks/src/test/resources/com/github/sevntu/checkstyle/checks/coding/InputNoNullForCollectionReturnCheckObjectArray.java

@@ -4,7 +4,7 @@
 import java.io.IOException;
 import java.util.jar.JarEntry;
 
-import org.assertj.core.internal.bytebuddy.implementation.bytecode.member.MethodInvocation;
+
 
 /* Config: default
  *
@@ -56,9 +56,9 @@ private static JarEntry getJarEntry() {
         return null;
     }
 
-    protected Object[] getMethodArguments(MethodInvocation invocation) {
+    protected Object[] getMethodArguments(Object invocation) {
         if (invocation != null) {
-              return new MethodInvocation[2];
+              return new Object[2];
         }
         else {
               return null;