ModelComponent doesn't accept a single np.float32

This test does not match a np.float32 on a 64 bit system:

https://github.com/sot/xija/blob/c65155303476ad53e308c7357e161f03fb5041da/xija/component/base.py#L128

which seems to be the default return type from engarchive for an 'AACCCDPT' value.