Fixed JUnit tests causing build issues due to mixing JUnit 4 & JUnit 5

partial-response/pom.xml

@@ -35,13 +35,15 @@
 
     <artifactId>partial-response</artifactId>
     <dependencies>
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-        </dependency>
         <dependency>
             <groupId>org.junit.vintage</groupId>
             <artifactId>junit-vintage-engine</artifactId>
+            <version>5.4.0</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-junit-jupiter</artifactId>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -49,10 +51,6 @@
             <artifactId>junit-jupiter-engine</artifactId>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.mockito</groupId>
-            <artifactId>mockito-core</artifactId>
-        </dependency>
     </dependencies>
     <build>
         <plugins>