Support pangocffi v0.11.0 + Use property() for setting resolution

[leifgehrmann]

Changes in pangocffi v0.11.0 are expected that will change a lot of the API calls to use property() pattern. See leifgehrmann/pangocffi#47

This PR updates the dependency version and API calls to support the new notation.

This PR also:

• Updates the FontMap's resolution to use the property() pattern as well.
• Updates tox.ini to include py310.

[codecov-commenter]

Codecov Report

Base: 75.00% // Head: 75.48% // Increases project coverage by +0.48% 🎉

Coverage data is based on head (bc6b5a7) compared to base (f60412e).
Patch coverage: 64.28% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #29      +/-   ##
==========================================
+ Coverage   75.00%   75.48%   +0.48%     
==========================================
  Files           6        6              
  Lines         152      155       +3     
==========================================
+ Hits          114      117       +3     
  Misses         38       38              

Impacted Files	Coverage Δ
pangocairocffi/create_update_functions.py	61.11% <0.00%> (ø)
pangocairocffi/font_functions.py	42.10% <0.00%> (ø)
pangocairocffi/render_functions.py	80.95% <ø> (ø)
pangocairocffi/font_map.py	85.71% <100.00%> (+0.93%)	⬆️

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