Deprecate varMap in favor of variable_names

[github-actions[bot]]

Pull Request Test Coverage Report for Build 5306490586

• 13 of 20 (65.0%) changed or added relevant lines in 2 files are covered.
• 15 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-1.9%) to 90.486%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/Utils.jl	3	6	50.0%
src/Equation.jl	10	14	71.43%
<!--	Total:	13	20	65.0%	-->

Files with Coverage Reduction	New Missed Lines	%
src/precompile.jl	4	80.18%
src/Utils.jl	11	72.22%
<!--	Total:	15		-->

Totals
Change from base Build 5095018727:	-1.9%
Covered Lines:	856
Relevant Lines:	946

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 5306794933

• 23 of 31 (74.19%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-3.2%) to 89.269%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
ext/DynamicExpressionsSymbolicUtilsExt.jl	12	13	92.31%
src/Utils.jl	2	5	40.0%
src/Equation.jl	9	13	69.23%
<!--	Total:	23	31	74.19%	-->

Totals
Change from base Build 5095018727:	-3.2%
Covered Lines:	940
Relevant Lines:	1053

---

💛 - Coveralls

[github-actions[bot]]

Benchmark Results

	master	2e9b45d6824995...	t[master]/t[2e9b45d6824995...]
eval/ComplexF32/evaluation	11.5 ± 0.75 ms	11.3 ± 0.72 ms	1.02
eval/ComplexF64/evaluation	14.1 ± 0.97 ms	14.6 ± 1 ms	0.967
eval/Float32/derivative	18.1 ± 3.8 ms	17.5 ± 2.7 ms	1.03
eval/Float32/derivative_turbo	20.5 ± 3.7 ms	20 ± 2.8 ms	1.03
eval/Float32/evaluation	3.58 ± 0.27 ms	3.5 ± 0.27 ms	1.02
eval/Float32/evaluation_turbo	1.27 ± 0.081 ms	1.22 ± 0.069 ms	1.04
eval/Float64/derivative	25.9 ± 0.72 ms	24 ± 0.64 ms	1.08
eval/Float64/derivative_turbo	29.4 ± 0.91 ms	27.7 ± 0.72 ms	1.06
eval/Float64/evaluation	3.75 ± 0.28 ms	3.64 ± 0.26 ms	1.03
eval/Float64/evaluation_turbo	1.74 ± 0.1 ms	1.69 ± 0.087 ms	1.03
time_to_load	1.99 ± 0.0072 s	2 ± 0.013 s	0.993
utils/combine_operators/break_sharing	0.0632 ± 0.0036 ms	0.0622 ± 0.0036 ms	1.02
utils/convert/break_sharing	0.0551 ± 0.0044 ms	0.0546 ± 0.0047 ms	1.01
utils/convert/preserve_sharing	0.235 ± 0.0067 ms	0.24 ± 0.0082 ms	0.978
utils/copy/break_sharing	0.0515 ± 0.0028 ms	0.0509 ± 0.0025 ms	1.01
utils/copy/preserve_sharing	0.232 ± 0.0045 ms	0.233 ± 0.0044 ms	0.998
utils/count_constants/break_sharing	26.3 ± 0.7 μs	27.2 ± 0.8 μs	0.967
utils/count_depth/break_sharing	29.1 ± 0.8 μs	28 ± 0.8 μs	1.04
utils/count_nodes/break_sharing	23.5 ± 0.7 μs	25.1 ± 0.7 μs	0.936
utils/get_set_constants!/break_sharing	0.105 ± 0.0018 ms	0.105 ± 0.0017 ms	1
utils/has_constants/break_sharing	8.66 ± 0.59 μs	8.75 ± 0.6 μs	0.989
utils/has_operators/break_sharing	3.03 ± 0.056 μs	2.51 ± 0.078 μs	1.21
utils/index_constants/break_sharing	0.081 ± 0.0034 ms	0.0836 ± 0.0039 ms	0.969
utils/is_constant/break_sharing	8.59 ± 0.6 μs	9.15 ± 0.57 μs	0.938
utils/simplify_tree/break_sharing	0.168 ± 0.016 ms	0.174 ± 0.017 ms	0.961

Benchmark Plots

A plot of the benchmark results have been uploaded as an artifact to the workflow run for this PR. Go to "Actions"->"Benchmark a pull request"->[the most recent run]->"Artifacts" (at the bottom).