Swap the diff order so that local is diffed against remote

[gsteel]

Closes #96

[codecov]

Codecov Report

Base: 59.50% // Head: 59.50% // No change to project coverage 👍

Coverage data is based on head (c191ef3) compared to base (2816175).
Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff            @@
##              1.3.x     #148   +/-   ##
=========================================
  Coverage     59.50%   59.50%           
  Complexity      201      201           
=========================================
  Files            32       32           
  Lines           642      642           
=========================================
  Hits            382      382           
  Misses          260      260           

Impacted Files	Coverage Δ
src/Console/DiffCommand.php	21.73% <0.00%> (ø)

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