Update dependency resolvelib to v0.8.1

This MR contains the following updates:

Package	Type	Update	Change
resolvelib	ironbank-pypi	minor	0.5.4 -> 0.8.1

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Release Notes

sarugaku/resolvelib

v0.8.1

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Features

• A new reporter hook resolving_conflicts is added. The resolver triggers this hook when it detects conflicts in the dependency tree, and before it attempts to fix them. The hook accepts one single argument causes, which is a list of (requirement, parent) 2-tuples that represents all the edges that lead to the detected conflicts. #&#8203;81 <https://github.com/sarugaku/resolvelib/issues/81>_

v0.8.0

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Features

• Add backtrack_causes to get_preference, which contains information about the requirements involved in the most recent backtrack. This allows the provider to utilise this information to tweak the ordering as well as for recording/reporting conflicts.

v0.7.1

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Bug Fixes

• When merging a candidate's dependencies, make sure the merge target is up-to-date within the loop, so the merge does not lose information when a candidate returns multiple dependency specifications under one identifier (e.g. specifyiung two dependencies a>1 and a<2, instead of one single a>1,<2 dependency). #&#8203;80 <https://github.com/sarugaku/resolvelib/issues/80>_

v0.7.0

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Features

• Redesign get_preference() to include resolution state on dependencies other than the currently working one, to allow the provider to better take account of the global resolver knowledge and determine the best strategy. The provider now can, for example, correctly calculate how far a dependency is from the root node in the graph. #&#8203;74 <https://github.com/sarugaku/resolvelib/issues/74>_

v0.6.0

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Features

• A new argument incompatibilities is now passed to the find_matches() hook, which the provider must use to exclude matches from the return value. #&#8203;68 <https://github.com/sarugaku/resolvelib/issues/68>_

• Redesign find_matches() to include resolution state on dependencies other than the currently working one, to handle usages that need to return candidates based on non-local states. One such example is PEP 508 direct URLs specified on a package, which need to be available to the same package specified with extras (which would have a different identifier). #&#8203;74 <https://github.com/sarugaku/resolvelib/issues/74>_

Bug Fixes

• The resolver no longer relies on implicit candidate equality to detect incompatibilities. This is done by an additional find_matches() argument; see the Features section to learn more. #&#8203;68 <https://github.com/sarugaku/resolvelib/issues/68>_

v0.5.5

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Features

• Provide type stubs for most classes. #&#8203;72 <https://github.com/sarugaku/resolvelib/issues/72>_

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