Define default item configuration on item directly

[jjochen]

No description provided.

[codecov]

Codecov Report

Merging #121 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #121   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          13     15    +2     
  Lines         920    933   +13     
  Branches       26     25    -1     
=====================================
+ Hits          920    933   +13

Impacted Files	Coverage Δ
Sources/JJStyles.swift	100% <100%> (ø)	⬆️
Sources/JJFloatingActionButton.swift	100% <100%> (ø)	⬆️
Sources/JJCircleView.swift	100% <100%> (ø)	⬆️
Sources/JJActionItem.swift	100% <100%> (ø)	⬆️
Sources/JJFloatingActionButton+Appearance.swift	100% <100%> (ø)
Sources/JJActionItem+Appearance.swift	100% <100%> (ø)

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