v2.0.3

What's Changed

• Add Heroku deployment and upgrade dependencies by @AshokShau in #133
• bump mongo-driver from version 1.x to 2.0 by @AshokShau in #134
• Migrate code from pkg/ to internal/ directory and minor fixes by @AshokShau in #135
• fix heroku deploy with docker by @AshokShau in c8daad9

Full Changelog: v2.0.2...V2.0.3