iOS icon updated & Material You design(beta)

What's Changed

• updated Name, Icon, and Splash screen by @DattatreyaReddy in #67
• removed previous icons by @DattatreyaReddy in #68
• Fix icon assets association by @matthewdias in #69
• fixed cast error of language filter by @DattatreyaReddy in #70
• version bump to 0.2.2 & material you by @DattatreyaReddy in #71

Full Changelog: 0.2.1...0.2.2