Changing min sdk to 25

Change-Id: I0d28069967854357ca755bf25dec19d4979bdecf
diff --git a/iconloaderlib/build.gradle b/iconloaderlib/build.gradle
index f6a820a..4fd3189 100644
--- a/iconloaderlib/build.gradle
+++ b/iconloaderlib/build.gradle
@@ -16,7 +16,7 @@
     publishNonDefault true
 
     defaultConfig {
-        minSdkVersion 21
+        minSdkVersion 25
         targetSdkVersion 28
         versionCode 1
         versionName "1.0"