Use same Pango Version for tests

[naveen521kk]

• For uniformity, the Pango version with which we test should be the same. We build a custom version of Pango and cache it now, other than windows. (https://github.com/ManimCommunity/ManimPango/pull/47/commits/5d3896916baa7ead8c7e88e83d1f59a07df9726c and https://github.com/ManimCommunity/ManimPango/pull/47/commits/ee97202016e29947b624d6409cf6cb74b14ee8c5)
• Print pango can cairo version on the headers during tests (https://github.com/ManimCommunity/ManimPango/pull/47/commits/c36ad94845ff9742c902b3df25332fe46cd73335)
• Add another font test.
• Bump Pango's version everywhere. (https://github.com/ManimCommunity/ManimPango/pull/47/commits/4291c4178af76c35259e05a82e5517a3476af190)

[codecov-io]

Codecov Report

Merging #47 (b83b36a) into main (f5dcf94) will decrease coverage by 1.69%. The diff coverage is n/a.

:exclamation: Current head b83b36a differs from pull request most recent head 4291c41. Consider uploading reports for the commit 4291c41 to get more accurate results

@@            Coverage Diff             @@
##             main      #47      +/-   ##
==========================================
- Coverage   81.10%   79.41%   -1.70%     
==========================================
  Files           6        5       -1     
  Lines         307      272      -35     
==========================================
- Hits          249      216      -33     
+ Misses         58       56       -2     

Impacted Files	Coverage Δ
manimpango/register_font.pyx	94.11% <0.00%> (-1.13%)	:arrow_down:
manimpango/__init__.py
manimpango/cmanimpango.pyx	68.04% <0.00%> (+0.59%)	:arrow_up:

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[naveen521kk]

With this, we can release v0.2.5.

[PhilippImhof]

I will try to do a review by Wednesday...

[naveen521kk]

what happened to automerge?