Upgrade to joblib 1.2.x

[osma]

This PR upgrades joblib from 1.1.0 to 1.2.*. The main reason is to get rid of the dependabot warning about an arbitrary code execution security vulnerability.

AFAICT, Annif isn't actually vulnerable because we don't use the pre_dispatch option at all.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[codecov]

Codecov Report

Base: 99.61% // Head: 99.61% // No change to project coverage 👍

Coverage data is based on head (5a603ad) compared to base (6e5a939).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #627   +/-   ##
=======================================
  Coverage   99.61%   99.61%           
=======================================
  Files          87       87           
  Lines        5945     5945           
=======================================
  Hits         5922     5922           
  Misses         23       23           

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