Upgrade JUnit from 4.12 to 4.13.1 (#76)

Author: sbabcoc

pom.xml

@@ -31,7 +31,7 @@
     <maven.compiler.target>1.7</maven.compiler.target>
     <java-utils.version>1.9.3</java-utils.version>
     <settings.version>2.3.3</settings.version>
-    <junit.version>4.12</junit.version>
+    <junit.version>4.13.1</junit.version>
     <testng.version>6.10</testng.version>
     <bytebuddy.version>1.10.3</bytebuddy.version>
     <logback.version>1.2.3</logback.version>