Version 3.1#25

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TheZoc wants to merge 9 commits intomasterfrom

Commits on Jun 2, 2022

- Bumped Warning level from 3 to 4
TheZoc
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- Removed previous custom allocators in favor of the ones now available in LZMA SDK `Alloc.h`
TheZoc
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Commits on Jun 4, 2022

- Simplified and cleaned up the log system
TheZoc
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Commits on Jun 5, 2022

- GetDifferences(), CreatePatch() and DoCreatePatch() now handle the path normalization internally
TheZoc
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- DoApplyPatchFile() and RestoreBackup() are now static and were removed from the header file
TheZoc
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Commits on Jun 6, 2022

- `CreatePatch.h` doesn't depend on `7zFile.h` anymore
TheZoc
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Commits on May 23, 2023

Commits on May 24, 2023

- Updated appveyor.yml
TheZoc
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