Update dependency axe-core to v4.8.4

This MR contains the following updates:

Package	Type	Update	Change
axe-core (source)	dependencies	patch	4.8.3 -> 4.8.4

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Release Notes

dequelabs/axe-core (axe-core)

v4.8.4: Release 4.8.4

Compare Source

This release should not result in different issue numbers. For TypeScript users, an error in type definitions has been corrected. This release could require a correction to how axe-core types are used. This release may change selectors on elements with the xmlns attribute, as the selectors axe-core prosed with those was invalid. Deduplication based on selectors between this and and prior versions of axe-core can fail because of this change.

Bug Fixes

• Add LICENSE-3RD-PARTY.txt file (#​4304) (139c553)
• avoid reading element-specific node properties of non-element node types (#​4317) (a2a6935), closes #​4316 #​4316
• d.ts: RawNodesResult issues (#​4229) (f105266)
• d.ts: RunOptions.reporter can be any string (#​4218) (80de793)
• utils/get-selector: ignore 'xmlns' attribute when generating a selector (#​4303) (8c68546)

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