Version 3.6.3

[asturur]

Backport all non breaking changes from latest 4 beta.

• fix(Object): ISSUE 6196 use set('canvas') to restore canvas fix(Object): ISSUE 6196 use set('canvas') to restore canvas #6216
• fix(fabric.IText): exitEditing won't error on missing hiddenTextarea. fabric.IText: better checks on exitEditing #6138
• fix(fabric.Object): getObjectScaling takes in account rotation of objects inside groups. Fix rendering of uniformStroke in groups #6118
• fix(fabric.Group): will draw shadow will call parent method. fix(fabric.Group): willDrawShadow has to always take in account children items #6116
• fix(svg_parsers): Add support for empty <style/> tags (Add support for empty <style/> tags #6169)
• fix(SVG_export, text): Check font faces markup for objects within groups (Check font faces markup for objects within groups #6195)
• fix(svg_export): remove extra space from svg export (ISSUE-6205, remove extra space from svg export #6209)
• fix(svg_import): ISSUE-6170 do not try to create missing clippath (ISSUE-6170 do not try to create missing clippath #6210)
• fix(fabric.Object) Adding existence check for this.canvas on object stacking mixins (Adding existence check for this.canvas on object stacking mixins #6207)