upgrade junit

Java/pom.xml

@@ -11,13 +11,21 @@
 
     <properties>
         <java.version>1.8</java.version>
+        <junit.jupiter.version>5.4.2</junit.jupiter.version>
+        <assertj.version>3.11.1</assertj.version>
     </properties>
 
     <dependencies>
         <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>${junit.jupiter.version}</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
@@ -26,12 +34,17 @@
         <plugins>
             <plugin>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
                 <configuration>
                     <source>${java.version}</source>
                     <target>${java.version}</target>
                 </configuration>
             </plugin>
+            <plugin>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>3.0.0-M3</version>
+            </plugin>
         </plugins>
     </build>
 
-</project>
+</project>

Java/src/test/java/com/gildedrose/GildedRoseTest.java

@@ -1,8 +1,9 @@
 package com.gildedrose;
 
-import static org.junit.Assert.*;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
-import org.junit.Test;
 
 public class GildedRoseTest {