Add Apache Commons Lang library.

build.gradle

@@ -23,6 +23,7 @@ repositories {
 
 dependencies {
   implementation 'com.google.guava:guava:32.1.2-jre'
+  implementation 'org.apache.commons:commons-lang3:3.13.0'
   // mandatory dependencies for using Spock
   implementation platform('org.apache.groovy:groovy-bom:4.0.15')
   implementation 'org.apache.groovy:groovy'

pom.xml

@@ -84,6 +84,11 @@
       <artifactId>guava</artifactId>
       <version>32.1.2-jre</version>
     </dependency>
+    <dependency>
+      <groupId>org.apache.commons</groupId>
+      <artifactId>commons-lang3</artifactId>
+      <version>3.13.0</version>
+    </dependency>
     <!-- Mandatory dependencies for using Spock -->
     <dependency>
       <groupId>org.spockframework</groupId>