update JUnit (#43)

* update JUnit

* update hamcrest
diff --git a/pom.xml b/pom.xml
index c5c2e82..f8a62d9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -149,13 +149,13 @@
       <dependency>

         <groupId>junit</groupId>

         <artifactId>junit</artifactId>

-        <version>4.12</version>

+        <version>4.13</version>

         <scope>test</scope>

       </dependency>

       <dependency>

         <groupId>org.hamcrest</groupId>

         <artifactId>hamcrest-core</artifactId>

-        <version>1.3</version>

+        <version>2.2</version>

         <scope>test</scope>

       </dependency>

       <dependency>