Added new APIs (#2)

Send email(s) in MIME format API
Resend stored email API
Retrieve stored email(s) API
Mailgun Async Client configuration
Asynchronously send email(s) API
Asynchronously send email(s) in MIME format API
Asynchronously resend message API
Bulk verification APIs
Bulk verification previews APIs
Seed List APIs
Import a list of whitelists from CSV file API
Import a list of unsubscribe from CSV file API
Import a list of complaints from CSV file API
Add Import a list of bounces from CSV file API

CHANGELOG.md

@@ -0,0 +1,32 @@
+# Mailgun Java SDK changelog
+
+All _notable_ changes to this project will be documented in this file.
+
+The format is based on _[Keep a Changelog][keepachangelog]_, and this project
+adheres to _[Semantic Versioning][semver]_.
+
+
+## [1.0.1] (released: 2022-06-20)
+
+### Added
+- Send email(s) in MIME format API
+- Resend stored email  API
+- Retrieve stored email(s) API
+- Mailgun Async Client configuration
+- Asynchronously send email(s) API
+- Asynchronously send email(s) in MIME format API
+- Asynchronously resend message API
+- Bulk verification APIs
+- Bulk verification previews APIs
+- Seed List APIs
+- Import a list of whitelists from CSV file API
+- Import a list of unsubscribe from CSV file API
+- Import a list of complaints from CSV file API
+- Add Import a list of bounces from CSV file API
+
+
+[1.0.1]: https://github.com/mailgun/mailgun-java/compare/release/1.0.0...release/1.0.1
+
+
+[keepachangelog]: https://keepachangelog.com/
+[semver]: https://semver.org/spec/v2.0.0.html