0.7.0

• Dropped support for Py2, now only Py3
• Updated documentation: #232
• Fixed docstring typos (thanks @Space0726!): #263
• added notification: Font.GuidelineWillBeAdded: #239
• Fixes for UFOZ (#209 testForExternalChanges and #218 glyphSet is required): #220
• Added close to font: #269
• Setting glyph.unicode will now set glyph.unicodes to a one member list: #258
• Add notifications for: Glyph.LeftMarginWillChange, Glyph.LeftMarginDidChange, Glyph.RightMarginWillChange, Glyph.RightMarginDidChange, Glyph.TopMarginWillChange, Glyph.TopMarginDidChange, Glyph.BottomMarginWillChange, Glyph.BottomMarginDidChange: #253
• Improved joinSegments: #259
• Added identifier to addComponent callback: #268
• Fix glyphs with components getting proper area value: #272
• Use ufoFormatTuple: #289
• Add ufoFormatVersionTuple property, deprecate ufoFormatVersion: #291