OpenMC Plotter 0.2.0

What's Changed

• Ability to import properties (temperature/density) by @paulromano in #63
• Support 2D meshes, energy function filter by @paulromano in #64
• Removing unused matplotlib backend query. by @pshriwise in #65
• Adding screenshots to the README by @pshriwise in #68
• Remove unused import of is_pyqt5 by @paulromano in #66
• Remove superfluous install of OpenMC Python API during CI by @paulromano in #70
• v0.2.0 release by @pshriwise in #71

Full Changelog: v0.1.1...v0.2.0