JavaFX Application class not in javafx.application package

I recently have updated Eclipse to version 2019-12 and my JDK to Java SE 13, and I learned afterwards that this JSE no longer includes JavaFX as a core library. So, I looked up the Maven dependency entries for newer JavaFX libraries compatible with JSE 13 and picked version 11. I added them to my pom.xml file as such:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>...</modelVersion>
    <groupId>...</groupId>
    <artifactId>...</artifactId>
    <version>...</version>
    <url>https://github.com/.../url>
    <name>...</name>
    <description>...</description>

    <dependencies>
        ...
        ...
        <!-- JavaFX is no longer included in JDK --> 
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-graphics</artifactId>
            <version>11</version>
            <type>pom</type>
        </dependency>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-controls</artifactId>
            <version>11</version>
       </dependency>
       <dependency>
           <groupId>org.openjfx</groupId>
           <artifactId>javafx-fxml</artifactId>
           <version>11</version>
       </dependency>
    </dependencies>

    <build>
        <sourceDirectory>src</sourceDirectory>
        <resources>
            <resource>
                <directory>src</directory>
                <excludes>
                    <exclude>**/*.java</exclude>
                </excludes>
            </resource>
        </resources>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.7.0</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

However, now some javafx imports in my source files cannot be resolved. For example:

import javafx.application.Application; //Application class not found
import javafx.beans.property.SimpleObjectProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.scene.paint.Color; //Color class not found

I’ve checked the javadocs for the javafx...Application and javafx...Color classes, and it appears they should be included among the class files within the graphics, controls, and fxml modules I linked as dependencies in the pom.xml file.

Why are my imports not resolving?