v2.5.6 - APIv21, issues #68 #69, grid layout, async update

fastlane/metadata/android/en-US/whatsnew/whatsnew-en-US

@@ -1,4 +1,7 @@
-Now correctly using the hours ahead setting #66
-Fixed broken pass progress indicator #67
-Fixed satellite data update crash
-Lots of refactoring, getting codebase ready for new features
+Reverted API version to v21, Android 5.0
+Fixed antenna rotator control issue #69
+Fixed Redmi dark theme colors bug
+Switched to grid layout in entries list
+Fetching satellite data asynchronously
+Added toggle from pass view to map view #68
+Further code refactoring and cleanup