Refine builtins type

[skrynski]

No description provided.

[o-]

Here are some stats for your PR:

• WARNING: the longest CI job test_release_2 took 2.45h
• binarytrees_naive regressed by 0.93
• Overall benchmarks improved by 1.0

Please find your performance results at https://rir-benchmarks.prl.fit.cvut.cz/diff?job_ids[]=6382048022&job_ids[]=6359193308&selection=all

[o-]

Here are some stats for your PR:

• WARNING: the longest CI job test_release_2 took 2.34h
• reversecomplement_2 regressed by 0.88
• binarytrees_naive regressed by 0.95
• fasta_naive_2 regressed by 0.95
• scalarFor regressed by 0.93
• Overall benchmarks regressed by 1.0

Please find your performance results at https://rir-benchmarks.prl.fit.cvut.cz/diff?job_ids[]=6416565044&job_ids[]=6411679721&selection=all