[Iconics - 5.1.0] Jetpack appstartup incompatible with kotlin `objects`
## About this issue

When I start my app on AVD Pixel XL API 27 I got a crash with that stack trace:

```
java.lang.RuntimeException: Unable to get provider androidx.startup.InitializationProvider: androidx.startup.StartupException: java.lang.IllegalAccessException: Class java.lang.Class<androidx.startup.AppInitializer> cannot access private  method void com.mikepenz.iconics.typeface.library.fontawesome.FontAwesome.<init>() of class java.lang.Class<com.mikepenz.iconics.typeface.library.fontawesome.FontAwesome>
        at android.app.ActivityThread.installProvider(ActivityThread.java:6242)
        at android.app.ActivityThread.installContentProviders(ActivityThread.java:5805)
        at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5722)
        at android.app.ActivityThread.-wrap1(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1656)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6494)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
     Caused by: androidx.startup.StartupException: java.lang.IllegalAccessException: Class java.lang.Class<androidx.startup.AppInitializer> cannot access private  method void com.mikepenz.iconics.typeface.library.fontawesome.FontAwesome.<init>() of class java.lang.Class<com.mikepenz.iconics.typeface.library.fontawesome.FontAwesome>
        at androidx.startup.AppInitializer.doInitialize(AppInitializer.java:162)
        at androidx.startup.AppInitializer.discoverAndInitialize(AppInitializer.java:198)
        at androidx.startup.InitializationProvider.onCreate(InitializationProvider.java:42)
        at android.content.ContentProvider.attachInfo(ContentProvider.java:1917)
        at android.content.ContentProvider.attachInfo(ContentProvider.java:1892)
        at android.app.ActivityThread.installProvider(ActivityThread.java:6239)
        at android.app.ActivityThread.installContentProviders(ActivityThread.java:5805) 
        at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5722) 
        at android.app.ActivityThread.-wrap1(Unknown Source:0) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1656) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:164) 
        at android.app.ActivityThread.main(ActivityThread.java:6494) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807) 
     Caused by: java.lang.IllegalAccessException: Class java.lang.Class<androidx.startup.AppInitializer> cannot access private  method void com.mikepenz.iconics.typeface.library.fontawesome.FontAwesome.<init>() of class java.lang.Class<com.mikepenz.iconics.typeface.library.fontawesome.FontAwesome>
        at java.lang.reflect.Constructor.newInstance0(Native Method)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
        at androidx.startup.AppInitializer.doInitialize(AppInitializer.java:140)
```
  
- How can the issue be reproduced / sample code
  I have no customization in code, only standard use in layout as stated by your docs.

## Details
- [ ] Used library version: Last 5.1.0 with Kotlin
- [ ] Used support library version
- [ ] Used gradle build tools version: 4.1.0
- [ ] Used tooling / Android Studio version: Android Studio 4.1
- [ ] Other used libraries, potential conflicting libraries

build.gradle file:

```
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'com.google.gms.google-services'
apply plugin: 'com.google.firebase.crashlytics'

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.2"

    defaultConfig {
        applicationId "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
        minSdkVersion 26
        targetSdkVersion 30
        versionCode 1
        versionName "2.0.0"
    }

    buildTypes {
        release {
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }
}

dependencies {
    // Base
    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.9'
    implementation 'androidx.core:core-ktx:1.3.2'

    // Extensions
    implementation 'android.arch.lifecycle:extensions:1.1.1'

    // Android X
    implementation 'androidx.appcompat:appcompat:1.2.0'
    implementation 'androidx.preference:preference-ktx:1.1.1'
    implementation 'androidx.cardview:cardview:1.0.0'
    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.2'

    // Firebase SDK
    implementation 'com.google.firebase:firebase-analytics-ktx:17.6.0'
    implementation 'com.google.firebase:firebase-crashlytics-ktx:17.2.2'

    // Barcode and related
    implementation 'com.google.mlkit:barcode-scanning:16.0.3'

    // HTTP Library and json
    implementation 'com.squareup.okhttp3:okhttp:4.9.0'
    implementation 'com.google.code.gson:gson:2.8.6'

    // Theme
    implementation 'com.google.android.material:material:1.2.1'

    // Icons
    implementation 'com.mikepenz:iconics-core:5.1.0'
    implementation 'com.mikepenz:iconics-views:5.1.0'
    implementation 'com.mikepenz:fontawesome-typeface:5.9.0.1-kotlin@aar'

    implementation rootProject.files('libs/bluetoothservice.jar')
}
```
