log4j: slf4j dependency as provided, log4j only needed in our testing

parent/pom.xml

@@ -32,6 +32,7 @@
 		<jdk.target>11</jdk.target>
 		<jdk.source>11</jdk.source>
 		<show.deprecations>false</show.deprecations>
+		<slf4j.version>1.7.31</slf4j.version>
 		<log4j2.version>2.16.0</log4j2.version>
 		<junit.version>4.13.2</junit.version>
 		<org.hamcrest.version>2.2</org.hamcrest.version>
@@ -163,18 +164,23 @@
 		</dependency>
 
 		<!-- Logging dependencies -->
+		<dependency>
+			<groupId>org.slf4j</groupId>
+			<artifactId>slf4j-api</artifactId>
+			<version>${slf4j.version}</version>
+		</dependency>
 		<dependency>
 			<groupId>org.apache.logging.log4j</groupId>
 			<artifactId>log4j-slf4j-impl</artifactId>
 			<version>${log4j2.version}</version>
-			<scope>provided</scope>
+			<scope>test</scope>
 		</dependency>
 
 		<dependency>
 			<groupId>org.apache.logging.log4j</groupId>
 			<artifactId>log4j-jcl</artifactId>
 			<version>${log4j2.version}</version>
-			<scope>provided</scope>
+			<scope>test</scope>
 		</dependency>
 
 		<!-- Apache commons -->