Fix support for dependent set in variable macro

[odow]

Closes #3336

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (0348332) 98.05% compared to head (f01e6df) 98.05%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3344   +/-   ##
=======================================
  Coverage   98.05%   98.05%           
=======================================
  Files          34       34           
  Lines        4882     4886    +4     
=======================================
+ Hits         4787     4791    +4     
  Misses         95       95           

Impacted Files	Coverage Δ
src/Containers/macro.jl	100.00% <100.00%> (ø)
src/macros.jl	98.62% <100.00%> (+<0.01%)	⬆️

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