Loosen click to coincide with aiida-core

[oerc0122]

Bump click version to allow 8.3 to coincide with aiida-core.

[mbercx]

Thanks @oerc0122! Seems reasonable to me to update the click dependency here, now that aiida-core v2.8 supports click v8.2 (since aiidateam/aiida-core@44ef2a1). I still considered if we should keep click v8.0 in the supported range, but aiida-core has click v8.1 as a lower bound since v2.1, and we currently set aiida-core~=2.6.

I did a bit of housekeeping in #203, the CI should pass now, but install tests are flaky due to unstable connection to www.pseudo-dojo.org:

E             requests.exceptions.ConnectTimeout: HTTPConnectionPool(host='www.pseudo-dojo.org', port=80): Max retries exceeded with url: /pseudos/nc-sr-04_pbe_standard_psp8.tgz (Caused by ConnectTimeoutError(<HTTPConnection(host='www.pseudo-dojo.org', port=80) at 0x7f9373c4cda0>, 'Connection to www.pseudo-dojo.org timed out. (connect timeout=30)'))

Rerunning the test will most likely fix the failure, but it's becoming more and more worth looking into #195.

EDIT: Yup, just rerunning (twice 😅 ) fixed the transient connection issue. So this is good to go for me. Will get a release out soon.

Quick question though: were you running into issues because you're relying on a different package that requires click v8.2? Because aiida-core still supports v8.1 AFAIK.