tex-polyglossia{,-doc}: update to 1.62

1.62
* \BCPdata was not fully expandable as required. Now it is.

1.61
Bug fixes
* Properly reset fonts on change to Latin-script other language
* Turn ^ shorthand off in aux file for Latin
* Fix stacking of nested languages and resulting bug in TOC language assignment
* Fix \greeknumeral{6}
* Fix (re)setting of scripts in inline language commands.

New features
* Introduce \BCPdata, a standardized way to gather localization information.

(markd)