Update dependencies, gradle, kotlin, okhttp, min and target SDK

[AlienAsRoger]

• gradle wrapper 4.10.1 -> 7.0.2, plugin 3.3.2 -> 7.0.3

• kotlin_version 1.3.11 -> 1.5.31

• add android:exported="true" to the Manifest as it's required by SDK 31

• 'androidx.appcompat:appcompat:1.1.0-alpha04' -> 1.4.0

• 'com.google.android.material:material:1.0.0' -> 1.4.0

• 'androidx.core:core-ktx:1.1.0-alpha05' -> 1.7.0

• 'androidx.constraintlayout:constraintlayout:1.1.3' -> 2.1.2

• 'com.squareup.picasso:picasso:2.71828' ->

• 'junit:junit:4.12' -> 4.13.2

• 'androidx.test:runner:1.1.1' -> 1.4.0

• 'androidx.test.espresso:espresso-core:3.1.1 -> 3.4.0

• update observable methods to match nullability

• 'com.google.android.material:material:1.0.0' -> 1.4.0

• 'com.squareup.retrofit2:retrofit:2.4.0' -> 2.9.0

• 'com.squareup.retrofit2:adapter-rxjava2:2.4.0' -> 2.9.0

• 'com.squareup.retrofit2:converter-moshi:2.4.0' -> 2.9.0

• 'androidx.paging:paging-runtime:2.1.0' -> ktx 3.1.0

• 'androidx.paging:paging-rxjava2:2.1.0- -> ktx 3.1.0

• 'com.jakewharton.rxbinding2:rxbinding:2.1.1' -> 2.2.0

• 'com.squareup.okhttp3:logging-interceptor:3.11.0- -> 5.0.0-alpha.3

• 'androidx.lifecycle:lifecycle-extensions:2.0.0' -> 2.2.0

• 'androidx.lifecycle:lifecycle-compiler:2.1.0-alpha04- -> 2.4.0

[AlienAsRoger]

@ocollet hi! 👋 Could you please take a look here? We would like to use the Unsplash integration with our project but due to some dependencies conflicts this is not possible at the moment and we had to fork this project and inject it as a source code. We would like to avoid forking source code for such purposes and proceed in a natural way. Please let me know if you have any questions or concerns. Thank you!