Update hevm to 8b2cb6266413f7f964e49053a278a895a21dc507 (#1575) #2765

Job	Run time
Build Echidna on macos-15-intel	44m 48s
Build Echidna on ubuntu-latest	30m 22s
Build Echidna on windows-latest	26m 57s
Test with solc 0.5.7 on ubuntu-latest	2m 16s
Test with solc 0.4.25 on ubuntu-latest	2m 32s
Test with solc 0.8.25 on ubuntu-latest	7m 2s
Test with solc 0.8.25 on windows-latest	12m 16s
Test with solc 0.6.12 on ubuntu-latest	2m 43s
Test with solc 0.8.10 on windows-latest	6m 44s
Test with solc 0.5.7 on windows-latest	7m 38s
Test with solc 0.4.25 on windows-latest	5m 5s
Test with solc 0.6.12 on windows-latest	7m 54s
Test with solc 0.7.5 on ubuntu-latest	3m 3s
Test with solc 0.8.10 on ubuntu-latest	3m 12s
Test with solc 0.7.5 on windows-latest	7m 19s
	2h 49m 51s

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