v1.4.1

This release contains a range of frequently requested changes, including:

• Set align_values to an int or bool to fix min alignment in writing (#316 by @michaelfruth)
• Fix some docstrings (#330 by @CodePurble , #325 by @MiWeiss)
• customization.getnames: respect protected names: (#334 by @tdegeus)
• No dict caching in bibdatabase (#348 by @MiWeiss). This makes the library slightly slower in some cases, but fixes previously wrong caching.

Edit: Due to a mistake, this tag was previously, for a couple of hours, on the wrong commit. This has now been fixed, i.e., the tag has been removed and correctly set again.