Save traces for every transaction in reproducer (#1180) #1773

Job	Run time
Build Echidna on ubuntu-20.04	3m 31s
Build Echidna on macos-latest	3m 14s
Build Echidna on windows-latest	9m 14s
Test with solc 0.4.25 on ubuntu-latest	3m 9s
Test with solc 0.5.7 on ubuntu-latest	3m 43s
Test with solc 0.6.12 on ubuntu-latest	3m 32s
Test with solc 0.7.5 on ubuntu-latest	4m 20s
Test with solc 0.4.25 on windows-latest	5m 5s
Test with solc 0.5.7 on windows-latest	4m 57s
Test with solc 0.6.12 on windows-latest	4m 35s
Test with solc 0.7.5 on windows-latest	5m 55s
	51m 15s

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