Conform BrickSize to Equatable and apply some suggested build settings changes

[klundberg]

No description provided.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@78e8c91). Click here to learn what that means.
The diff coverage is 0%.

@@            Coverage Diff            @@
##             master     #197   +/-   ##
=========================================
  Coverage          ?   93.43%           
=========================================
  Files             ?       40           
  Lines             ?     4450           
  Branches          ?      363           
=========================================
  Hits              ?     4158           
  Misses            ?      291           
  Partials          ?        1

Impacted Files	Coverage Δ
Source/Models/BrickDimension.swift	97.51% <0%> (ø)

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