Upgrade pitest-maven-plugin 1.18.1 -> 1.18.2

See:
- https://github.com/hcoles/pitest/releases/tag/1.18.2

pom.xml

@@ -1525,7 +1525,7 @@
                 <plugin>
                     <groupId>org.pitest</groupId>
                     <artifactId>pitest-maven</artifactId>
-                    <version>1.18.1</version>
+                    <version>1.18.2</version>
                     <configuration>
                         <excludedClasses>
                             <!-- AutoValue generated classes. -->