Add conditional 0.5.0

pom.xml

@@ -24,6 +24,7 @@
         <mon.version>0.10.0</mon.version>
         <mockito.version>2.18.3</mockito.version>
         <java-semver.version>0.9.0</java-semver.version>
+        <conditional.version>0.5.0</conditional.version>
     </properties>
 
     <dependencies>
@@ -37,6 +38,11 @@
             <artifactId>mon</artifactId>
             <version>${mon.version}</version>
         </dependency>
+        <dependency>
+            <groupId>net.kemitix</groupId>
+            <artifactId>conditional</artifactId>
+            <version>${conditional.version}</version>
+        </dependency>
         <dependency>
             <groupId>com.github.zafarkhaja</groupId>
             <artifactId>java-semver</artifactId>