Add CI for MW 1.44-1.45 and remove MW 1.39

[paladox]

• Adds support for MW 1.44 and 1.45.
• Bumps minimum MediaWiki version to 1.43.
• Bumps minimum SMW version to 6.0.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.43%. Comparing base (2172565) to head (dbaa48a).
⚠️ Report is 11 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #107   +/-   ##
=========================================
  Coverage     82.43%   82.43%           
  Complexity       80       80           
=========================================
  Files             7        7           
  Lines           205      205           
=========================================
  Hits            169      169           
  Misses           36       36           

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[jaideraf]

It is missing MW 1.45

[paladox]

It is missing MW 1.45

Oh, whoops, fixed!