Upgrade to JUnit 5.

pom.xml

@@ -74,7 +74,7 @@
 		<hamcrest.version>1.3</hamcrest.version>
 		<jackson-bom.version>2.9.9.20190727</jackson-bom.version>
 		<jsr305.version>3.0.2</jsr305.version>
-		<junit.version>4.12</junit.version>
+		<junit-bom.version>5.5.1</junit-bom.version>
 		<lombok.version>1.18.6</lombok.version>
 		<mockito.version>2.25.1</mockito.version>
 		<mongo.version>3.11.0-rc0</mongo.version>
@@ -462,6 +462,14 @@
 				<type>pom</type>
 				<scope>import</scope>
 			</dependency>
+
+			<dependency>
+				<groupId>org.junit</groupId>
+				<artifactId>junit-bom</artifactId>
+				<version>${junit-bom.version}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
 		</dependencies>
 	</dependencyManagement>
 
@@ -560,9 +568,20 @@
 		</dependency>
 
 		<dependency>
-			<groupId>junit</groupId>
-			<artifactId>junit</artifactId>
-			<version>${junit.version}</version>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-api</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-engine</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-params</artifactId>
 			<scope>test</scope>
 		</dependency>
 
@@ -579,6 +598,13 @@
 			<scope>test</scope>
 		</dependency>
 
+		<dependency>
+			<groupId>org.mockito</groupId>
+			<artifactId>mockito-junit-jupiter</artifactId>
+			<version>${mockito.version}</version>
+			<scope>test</scope>
+		</dependency>
+
 		<dependency>
 			<groupId>io.projectreactor</groupId>
 			<artifactId>reactor-test</artifactId>