fix: widen type constraints for TemplateExpression evaluation

[MilesCranmer]

No description provided.

[github-actions]

Benchmark Results

	master	c262642...	master/c262642711b53a...
search/multithreading	22.3 ± 1 s	21 ± 1.9 s	1.06
search/serial	35.1 ± 0.35 s	33.3 ± 0.4 s	1.05
utils/best_of_sample	1.75 ± 1.5 μs	2.06 ± 1.6 μs	0.85
utils/check_constraints_x10	12.1 ± 3.2 μs	12.2 ± 3.2 μs	0.987
utils/compute_complexity_x10/Float64	2.12 ± 0.11 μs	2.09 ± 0.11 μs	1.01
utils/compute_complexity_x10/Int64	2.06 ± 0.12 μs	2.05 ± 0.11 μs	1
utils/compute_complexity_x10/nothing	1.43 ± 0.12 μs	1.44 ± 0.13 μs	0.993
utils/insert_random_op_x10	5.87 ± 1.9 μs	5.85 ± 1.8 μs	1
utils/next_generation_x100	0.363 ± 0.12 ms	0.444 ± 0.12 ms	0.818
utils/optimize_constants_x10	0.0394 ± 0.009 s	0.0378 ± 0.0085 s	1.04
utils/randomly_rotate_tree_x10	5.26 ± 0.6 μs	5.21 ± 0.57 μs	1.01
time_to_load	1.81 ± 0.025 s	1.81 ± 0.0055 s	1

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).

[coveralls]

Pull Request Test Coverage Report for Build 11992818084

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 95.462%

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Totals
Change from base Build 11932767677:	0.0%
Covered Lines:	3113
Relevant Lines:	3261

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💛 - Coveralls