Fix numpy bool type

• Fix Numpy 1.x invalid boolean type

Since %Version 1.2.0 is supposed to be the last version of plantery-coverage compatible with Numpy 1.x (see #117), we released this hot-fix to ensure that it remain valid with these requirements:

numpy<2
planetary-coverage

(in that case it should pull 1.2.1 even after the release of %Version 1.3.0)

/cc @lpenasa (thanks!)