Make GeoLite2 file decompression memory efficient

[acelaya]

Closes #71

Refactor logic to decompress a GeoLite2 db file once it has been downloaded, so that we don't try to load the whole file in memory, but do it in chunks instead.

This ensures Shlink does not crash if the amount of memory reserved for it is lower than the GeoLite db file size.

[codecov]

Codecov Report

❌ Patch coverage is 82.35294% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.11%. Comparing base (44c4c06) to head (af0d94e).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/GeoLite2/DbUpdater.php	79.06%	9 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #72      +/-   ##
============================================
- Coverage     97.02%   91.11%   -5.92%     
- Complexity       36       46      +10     
============================================
  Files            11       11              
  Lines           101      135      +34     
============================================
+ Hits             98      123      +25     
- Misses            3       12       +9     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[acelaya]

Superseded by #73