Fix some downstream Symbolics 3 compatibility issues

[ChrisRackauckas]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 1146391999

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+2.4%) to 63.636%

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Totals
Change from base Build 1146067631:	2.4%
Covered Lines:	98
Relevant Lines:	154

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💛 - Coveralls

[codecov]

Codecov Report

Merging #39 (1b0da14) into main (e4be118) will increase coverage by 2.38%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #39      +/-   ##
==========================================
+ Coverage   61.25%   63.63%   +2.38%     
==========================================
  Files           4        4              
  Lines         160      154       -6     
==========================================
  Hits           98       98              
+ Misses         62       56       -6     

Impacted Files	Coverage Δ
src/utils.jl	58.62% <ø> (+10.04%)	⬆️
src/parse.jl	96.77% <100.00%> (ø)

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