test: fix 'SLF4J(W): No SLF4J providers were found.' warning (#1772)

playwright/pom.xml

@@ -57,6 +57,15 @@
       <groupId>org.java-websocket</groupId>
       <artifactId>Java-WebSocket</artifactId>
     </dependency>
+    <!-- 
+      The following slf4j-simple dependency resolves the warning:
+      'SLF4J(W): No SLF4J providers were found.'
+      This warning is produced by the org.java-websocket library.
+    -->
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-simple</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.junit.jupiter</groupId>
       <artifactId>junit-jupiter-engine</artifactId>

pom.xml

@@ -48,6 +48,7 @@
     <junit.version>5.12.1</junit.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <websocket.version>1.6.0</websocket.version>
+    <slf4j.version>2.0.17</slf4j.version>
     <opentest4j.version>1.3.0</opentest4j.version>
   </properties>
 
@@ -91,6 +92,17 @@
         <version>${websocket.version}</version>
         <scope>test</scope>
       </dependency>
+      <!-- 
+        The following slf4j-simple dependency resolves the warning:
+        'SLF4J(W): No SLF4J providers were found.'
+        This warning is produced by the org.java-websocket library.
+      -->
+      <dependency>
+        <groupId>org.slf4j</groupId>
+        <artifactId>slf4j-simple</artifactId>
+        <version>${slf4j.version}</version>
+        <scope>test</scope>
+      </dependency>
       <dependency>
         <groupId>org.junit.jupiter</groupId>
         <artifactId>junit-jupiter-api</artifactId>