Add Python 3.13 support; drop Python 3.7 support

[MarshalX]

No description provided.

[codspeed-hq]

CodSpeed Performance Report

Merging #50 will degrade performances by 25.31%

_{Comparing python-3-13-support (5e6e569) with main (2dd657d)}

🎉 Hooray! pytest-codspeed just leveled up to 3.0.0-b4!

A heads-up, this is a breaking change and it might affect your current performance baseline a bit. But here's the exciting part - it's packed with new, cool features and promises improved result stability 🥳!
Curious about what's new? Visit our releases page to delve into all the awesome details about this new version.

Summary

⚡ 51 improvements
❌ 4 regressions
✅ 137 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	python-3-13-support	Change
❌	test_dag_cbor_decode[roundtrip01.json]	18.2 µs	23.2 µs	-21.83%
⚡	test_dag_cbor_decode[roundtrip02.json]	19 µs	16.7 µs	+13.73%
⚡	test_dag_cbor_decode[roundtrip03.json]	18.7 µs	16.7 µs	+12.25%
⚡	test_dag_cbor_decode[roundtrip05.json]	25.1 µs	18.1 µs	+39.23%
⚡	test_dag_cbor_decode[roundtrip06.json]	17.2 µs	15 µs	+14.41%
⚡	test_dag_cbor_decode[roundtrip08.json]	18.4 µs	16.7 µs	+10.29%
⚡	test_dag_cbor_decode[roundtrip09.json]	22 µs	19.2 µs	+14.46%
⚡	test_dag_cbor_decode[roundtrip18.json]	19.3 µs	17.4 µs	+11.07%
⚡	test_dag_cbor_decode[roundtrip20.json]	18.7 µs	16.8 µs	+11.16%
⚡	test_dag_cbor_decode[roundtrip21.json]	18.4 µs	16.7 µs	+10.02%
⚡	test_dag_cbor_decode[roundtrip22.json]	18.8 µs	16.7 µs	+12.8%
⚡	test_dag_cbor_decode[roundtrip23.json]	19.5 µs	17.4 µs	+12.17%
⚡	test_dag_cbor_decode[roundtrip25.json]	18.9 µs	16.8 µs	+12.55%
⚡	test_dag_cbor_decode[roundtrip26.json]	18.9 µs	16.7 µs	+13.18%
⚡	test_dag_cbor_decode[roundtrip27.json]	18.8 µs	16.7 µs	+12.76%
⚡	test_dag_cbor_decode_fixtures[array-5-nested]	25.1 µs	21.9 µs	+14.95%
⚡	test_dag_cbor_decode_fixtures[array-500]	19.2 µs	17.3 µs	+10.97%
⚡	test_dag_cbor_decode_fixtures[array-6433713753386423]	19.1 µs	17.3 µs	+10.37%
⚡	test_dag_cbor_decode_fixtures[array-65536]	19.1 µs	17.2 µs	+11.41%
⚡	test_dag_cbor_decode_fixtures[array-9007199254740991]	19.1 µs	17.3 µs	+10.56%
...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

[MarshalX]

upd. can't reproduce locally. no diff (as expected)

interesting. py312 vs py313: