Please help me with dependencies problem in Flutter

Question

Can someone help me with dependencies issues? I'm stuck here and I can't get my app started.

FAILURE: Build failed with an exception.                                
                                                                        
* What went wrong:                                                      
Could not determine the dependencies of task ':app:compileDebugJavaWithJavac'.
> Could not resolve all task dependencies for configuration ':app:debugCompileClasspath'.
   > Could not resolve com.google.android.gms:play-services-base:{strictly 16.0.1}.
     Required by:                                                       
         project :app                                                   
      > Cannot find a version of 'com.google.android.gms:play-services-base' that satisfies the version constraints: 
           Dependency path 'android:app:unspecified' --> 'io.flutter.plugins.firebasedynamiclinks:firebase_dynamic_links:1.0-SNAPSHOT' --> 'com.google.firebase:firebase-dynamic-links:16.1.8' --> 'com.google.android.gms:play-services-base:16.0.1'
           Constraint path 'android:app:unspecified' --> 'com.google.android.gms:play-services-base:{strictly 16.0.1}' because of the following reason: debugRuntimeClasspath uses version 16.0.1
           Dependency path 'android:app:unspecified' --> 'com.google.firebase:firebase-messaging:20.0.1' --> 'com.google.firebase:firebase-iid:20.0.1' --> 'com.google.firebase:firebase-iid-interop:17.0.0' --> 'com.google.android.gms:play-services-base:17.0.0'
                                                                        
   > Could not resolve com.google.android.gms:play-services-base:16.0.1.
     Required by:                                                       
         project :app > com.google.firebase:firebase-dynamic-links:16.1.8
      > Cannot find a version of 'com.google.android.gms:play-services-base' that satisfies the version constraints: 
           Dependency path 'android:app:unspecified' --> 'io.flutter.plugins.firebasedynamiclinks:firebase_dynamic_links:1.0-SNAPSHOT' --> 'com.google.firebase:firebase-dynamic-links:16.1.8' --> 'com.google.android.gms:play-services-base:16.0.1'
           Constraint path 'android:app:unspecified' --> 'com.google.android.gms:play-services-base:{strictly 16.0.1}' because of the following reason: debugRuntimeClasspath uses version 16.0.1
           Dependency path 'android:app:unspecified' --> 'com.google.firebase:firebase-messaging:20.0.1' --> 'com.google.firebase:firebase-iid:20.0.1' --> 'com.google.firebase:firebase-iid-interop:17.0.0' --> 'com.google.android.gms:play-services-base:17.0.0'
                                                                        
   > Could not resolve com.google.android.gms:play-services-base:17.0.0.
     Required by:                                                       
         project :app > com.google.firebase:firebase-messaging:20.0.1 > com.google.firebase:firebase-iid:20.0.1 > com.google.firebase:firebase-iid-interop:17.0.0
      > Cannot find a version of 'com.google.android.gms:play-services-base' that satisfies the version constraints: 
           Dependency path 'android:app:unspecified' --> 'io.flutter.plugins.firebasedynamiclinks:firebase_dynamic_links:1.0-SNAPSHOT' --> 'com.google.firebase:firebase-dynamic-links:16.1.8' --> 'com.google.android.gms:play-services-base:16.0.1'
           Constraint path 'android:app:unspecified' --> 'com.google.android.gms:play-services-base:{strictly 16.0.1}' because of the following reason: debugRuntimeClasspath uses version 16.0.1
           Dependency path 'android:app:unspecified' --> 'com.google.firebase:firebase-messaging:20.0.1' --> 'com.google.firebase:firebase-iid:20.0.1' --> 'com.google.firebase:firebase-iid-interop:17.0.0' --> 'com.google.android.gms:play-services-base:17.0.0'
                                                                        
                                                                        
* Try:                                                                  
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This is what my build.gradle looks like, I've tried so many times to change the gradle here, but nothing really works:

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    // implementation 'com.google.firebase:firebase-analytics:17.2.3'
    // implementation "com.google.firebase:firebase-auth:19.3.0"
    implementation 'com.google.firebase:firebase-messaging:20.0.1'

    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
}