Added Features and Updated Example App

[rcoley93]

Updated:

• Kotlin Version
• Gradle Build
• compileSDK to 30
• Example app to fully show library's full features

Removed:

• Unnecessary Permissions

Added:

• The ability to add multiple To addresses
• The ability to add cc email(s)
• The ability to add bcc email(s)
• View Binding

[nedimf]

I made this into release v0.0.8, once again thank you @rcoley93 for your contribution.