Version 0.3.0 of sumo-wrapper-python

What's Changed

• Improve tests by @thezultimate in #114
• Outside token fix by @thezultimate in #112
• Pointed preview env to NodeJS preview by @thezultimate in #115
• Loosen requirements and improve setup scripts by @perolavsvendsen in #119
• Separate test requirements by @perolavsvendsen in #123
• bump required py version to 3.6 by @perolavsvendsen in #126

Full Changelog: 0.2.2...v0.3.0