Raise requests error on HTTP error code

[esfalsa]

Spyglass wasn't properly checking if the user's nation didn't exist, at least on my local machine; this PR should resolve those issues.

Relevant:

• https://stackoverflow.com/questions/16511337/correct-way-to-try-except-using-python-requests-module#comment65361103_16511493
• https://requests.readthedocs.io/en/latest/api/#requests.Response.raise_for_status