All pythermalcomfort functions should accept array as input

[FedericoTartarini]

• [x] heat_index
• [x] humidex
• [x] at
• [x] cooling_effect
• [x] a_pmv
• [x] e_pmv
• [x] adaptive_ashrae
• [x] adaptive_en
• [x] clo_tout
• [x] ankle_draft
• [x] athb
• [ ] pet_steady
• [ ] wci
• [ ] solar_gain
• [ ] pmv_ppd
• [ ] pmv
• [ ] set_tmp
• [ ] two_nodes
• [ ] use_fans_heatwaves
• [ ] utci
• [ ] vertical_tmp_grad_ppd
• [ ] phs
• [ ] wbgt
• [ ] net
• [ ] discomfort_index
• [ ] JOS3
• [ ] ATCS
• [ ] zhang_sensation_comfort