Skylight v1.2

Updated citation to reflect the publication of the matching paper which inspired the package.

Changes:

• updating reference (post manuscript publication)
• adding required UTF-8 encoding (special characters in citation)

New reference:

Hufkens, K. et al. (2023) ‘Evaluating the effects of moonlight on the vertical flight profiles of three western palaearctic swifts’. Royal Society Proceedings B. doi: 10.1098/rspb.2023.0957