Bump to '3.21.0'

Author: l3ger0j

app/build.gradle

@@ -12,8 +12,8 @@ android {
         applicationId "org.qp.android"
         minSdkVersion 26
         targetSdkVersion 34
-        versionCode 202002
-        versionName "3.20.2"
+        versionCode 202100
+        versionName "3.21.0"
         resourceConfigurations += ['en', 'ru']
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }