Bump vuetify from 2.6.12 to 2.6.13 in /webapp

Bumps vuetify from 2.6.12 to 2.6.13.

Release notes

Sourced from vuetify's releases.

v2.6.13

🔧 Bug Fixes

• ripple: check parent before calling removeChild (#14573) (63c2267), closes #13457
• VAutocomplete: remove unused allowOverflow prop (f16c2c5), closes #16008
• VDataTable: native event as argument to click:row (#15864) (17dd133), closes #10302

Commits

• aa71f21 chore(release): publish v2.6.13
• 63c2267 fix(ripple): check parent before calling removeChild (#14573)
• 17dd133 fix(VDataTable): native event as argument to click:row (#15864)
• f16c2c5 fix(VAutocomplete): remove unused allowOverflow prop
• See full diff in compare view

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