[1.16.X] Adding a non mod dependency

Hello, I'm having some trouble adding a dependency that isn't related to forge.

I added the dependency here in the build.gradle:

dependencies {
    // Specify the version of Minecraft to use, If this is any group other then 'net.minecraft' it is assumed
    // that the dep is a ForgeGradle 'patcher' dependency. And it's patches will be applied.
    // The userdev artifact is a special name and will get all sorts of transformations applied to it.
    minecraft 'net.minecraftforge:forge:1.16.4-35.0.18'

    // You may put jars on which you depend on in ./libs or you may define them like so..
    // compile "some.group:artifact:version:classifier"
    // compile "some.group:artifact:version"
    compile 'com.google.firebase:firebase-admin:7.0.1'

    // Real examples
    // compile 'com.mod-buildcraft:buildcraft:6.0.8:dev'  // adds buildcraft to the dev env
    // compile 'com.googlecode.efficient-java-matrix-library:ejml:0.24' // adds ejml to the dev env

    // The 'provided' configuration is for optional dependencies that exist at compile-time but might not at runtime.
    // provided 'com.mod-buildcraft:buildcraft:6.0.8:dev'

    // These dependencies get remapped to your current MCP mappings
    // deobf 'com.mod-buildcraft:buildcraft:6.0.8:dev'

    // For more info...
    // http://www.gradle.org/docs/current/userguide/artifact_dependencies_tutorial.html
    // http://www.gradle.org/docs/current/userguide/dependency_management.html

}

But when I do the the runClient configuration I get this error:

[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: java.lang.IncompatibleClassChangeError: Class com.google.common.base.Predicates$ObjectPredicate$1 does not implement the requested interface java.util.function.Predicate
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at net.minecraftforge.userdev.ClasspathLocator.locateMods(ClasspathLocator.java:85)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at net.minecraftforge.userdev.ClasspathLocator.initArguments(ClasspathLocator.java:69)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer.lambda$new$7(ModDiscoverer.java:91)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer.<init>(ModDiscoverer.java:91)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at net.minecraftforge.fml.loading.FMLLoader.beginModScan(FMLLoader.java:214)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at net.minecraftforge.fml.loading.FMLServiceProvider.runScan(FMLServiceProvider.java:107)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at cpw.mods.modlauncher.TransformationServiceDecorator.runScan(TransformationServiceDecorator.java:114)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at cpw.mods.modlauncher.TransformationServicesHandler.lambda$runScanningTransformationServices$8(TransformationServicesHandler.java:115)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:271)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at java.base/java.util.HashMap$ValueSpliterator.forEachRemaining(HashMap.java:1675)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at cpw.mods.modlauncher.TransformationServicesHandler.runScanningTransformationServices(TransformationServicesHandler.java:116)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at cpw.mods.modlauncher.TransformationServicesHandler.initializeTransformationServices(TransformationServicesHandler.java:63)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at cpw.mods.modlauncher.Launcher.run(Launcher.java:76)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at cpw.mods.modlauncher.Launcher.main(Launcher.java:66)
[12:12:01] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: 	at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:105)

The current Forge wiki doesn't have information on dependencies so I'm not sure if I'm forgetting to do something. I wasn't able to figure out what the error was. Any help is greatly appreciated, thanks!