[FIX] Minor fixes to reenable falling CI

[PrimozGodec]

Description of changes

• Cryptography package requires pip>19.3 to install Linux wheels. Otherwise, it wants to build, which fails. https://cryptography.io/en/latest/installation/. I increased the minimum pip version to >=19.3.
• Pandas will make Copy-on-write default in 3.0.0 realise which also changes constructors behaviour to copy all arrays. I set copy=False in the OrangeDataFrame constructor to keep the current behaviour also in Pandas 3.0.0.
• Numpy will soon release version 2, which will break Orange since it requires all packages to be built against version 2.0.0 and probably all dependent packages will not be ready. Also, Orange may not be ready. Pin numpy<2.
• When the oldest test was not working, CSV Import got a new test, test_long_data, which seems to fail on Pandas 1.* since it raises TypeError instead of expected ValueError (it doesn't happen in Pandas 2.*). From caution, I added a check for the TypeError instead of raising the required Pandas to >=2.0.0.

Includes

• Code changes
• Tests
• Documentation

[codecov]

Codecov Report

Merging #6751 (3972575) into master (ba951fa) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6751      +/-   ##
==========================================
- Coverage   88.13%   88.13%   -0.01%     
==========================================
  Files         322      322              
  Lines       70589    70590       +1     
==========================================
  Hits        62216    62216              
- Misses       8373     8374       +1