Prevent errors when loading axe in a page with prototype.js
aria-allowed-attr: allow meter role allowed aria-* attributes on meter element (#4435) (7ac6392)
aria-allowed-role: add gridcell, separator, slider and treeitem to allowed roles of button element (#4398) (4788bf8)
aria-roles: correct abstract roles (types) for aria-roles(#4421)
aria-valid-attr-value: aria-controls & aria-haspopup incomplete (#4418)
fix building axe-core translation files with region locales (#4396) (5c318f3), closes #4388
invalidrole: allow upper and mixed case role names (#4358) (105016c), closes #2695
isVisibleOnScreen: account for position: absolute elements inside overflow container (#4405) (2940f6e), closes #4016
label-content-name-mismatch: better dismiss and wysiwyg symbolic text characters (#4402)
region: Decorative images ignored by region rule (#4412)
target-size: ignore descendant elements in shadow dom (#4410) (6091367)
target-size: pass for element that has nearby elements that are obscured (#4422) (3a90bb7), closes #4387