Assortment of new functions

[gs-jp1]

String: ltrim, rtrim Math: cbrt Date: dayOfYear

[github-actions[bot]]

Test Results

   516 files  ±0     516 suites  ±0   33m 56s :stopwatch: - 5m 59s 3 800 tests +4  3 768 :heavy_check_mark: +4  32 :zzz: ±0  0 :x: ±0  5 098 runs  +4  5 066 :heavy_check_mark: +4  32 :zzz: ±0  0 :x: ±0 

Results for commit d12f9a96. ± Comparison against base commit 8d722d9f.