CompatHelper: bump compat for SymbolicUtils in [weakdeps] to 4, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the SymbolicUtils package from 0.19, ^1.0.5, 2, 3 to 0.19, ^1.0.5, 2, 3, 4.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	master	1d50414...	master / 1d50414...
search/multithreading	14.6 ± 0.072 s	14.6 ± 0.18 s	1 ± 0.013
search/serial	32.2 ± 0.13 s	32 ± 0.1 s	1.01 ± 0.0052
utils/best_of_sample	1.77 ± 0.44 μs	1.74 ± 0.45 μs	1.02 ± 0.36
utils/check_constraints_x10	16.5 ± 4.2 μs	16.5 ± 4.2 μs	0.998 ± 0.36
utils/compute_complexity_x10/Float64	2.15 ± 0.09 μs	2.16 ± 0.09 μs	0.995 ± 0.059
utils/compute_complexity_x10/Int64	2.06 ± 0.09 μs	2.08 ± 0.08 μs	0.99 ± 0.058
utils/compute_complexity_x10/nothing	1.52 ± 0.089 μs	1.52 ± 0.09 μs	1 ± 0.083
utils/insert_random_op_x10	5.14 ± 1.6 μs	5.36 ± 1.7 μs	0.959 ± 0.43
utils/next_generation_x100	0.444 ± 0.022 ms	0.439 ± 0.023 ms	1.01 ± 0.074
utils/optimize_constants_x10	0.0339 ± 0.0076 s	0.0333 ± 0.0072 s	1.02 ± 0.32
utils/randomly_rotate_tree_x10	7.92 ± 0.9 μs	7.88 ± 0.9 μs	1.01 ± 0.16
time_to_load	2.63 ± 0.021 s	2.63 ± 0.022 s	0.997 ± 0.011

Memory benchmarks

	master	1d50414...	master / 1d50414...
search/multithreading	0.206 G allocs: 53.2 GB	0.205 G allocs: 54 GB	0.986
search/serial	0.207 G allocs: 53.8 GB	0.207 G allocs: 53.8 GB	1
utils/best_of_sample	0.038 k allocs: 3.25 kB	0.038 k allocs: 3.25 kB	1
utils/check_constraints_x10	0.034 k allocs: 0.875 kB	0.034 k allocs: 0.875 kB	1
utils/compute_complexity_x10/Float64	0 allocs: 0 B	0 allocs: 0 B
utils/compute_complexity_x10/Int64	0 allocs: 0 B	0 allocs: 0 B
utils/compute_complexity_x10/nothing	0 allocs: 0 B	0 allocs: 0 B
utils/insert_random_op_x10	0.04 k allocs: 1.56 kB	0.046 k allocs: 1.94 kB	0.806
utils/next_generation_x100	4.62 k allocs: 0.275 MB	4.62 k allocs: 0.276 MB	0.999
utils/optimize_constants_x10	26.4 k allocs: 28.5 MB	21.5 k allocs: 21.8 MB	1.31
utils/randomly_rotate_tree_x10	0.042 k allocs: 1.34 kB	0.042 k allocs: 1.34 kB	1
time_to_load	0.145 k allocs: 11 kB	0.145 k allocs: 11 kB	1

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.21%. Comparing base (47cece6) to head (1d50414).
⚠️ Report is 6 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #511      +/-   ##
==========================================
- Coverage   94.23%   94.21%   -0.03%     
==========================================
  Files          42       42              
  Lines        3836     3836              
==========================================
- Hits         3615     3614       -1     
- Misses        221      222       +1     

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