Bump ajv from 6.12.4 to 6.12.6

Created by: dependabot-preview[bot]

Bumps ajv from 6.12.4 to 6.12.6.

Release notes

Sourced from ajv's releases.

v6.12.6

Fix performance issue of "url" format.

v6.12.5

Fix uri scheme validation (@ChALkeR). Fix boolean schemas with strictKeywords option (#1270)

Commits

• fe59143 6.12.6
• d580d3e Merge pull request #1298 from ajv-validator/fix-url
• fd36389 fix: regular expression for "url" format
• 490e34c docs: link to v7-beta branch
• 9cd93a1 docs: note about v7 in readme
• 877d286 Merge pull request #1262 from b4h0-c4t/refactor-opt-object-type
• f1c8e45 6.12.5
• 764035e Merge branch 'ChALkeR-chalker/fix-comma'
• 3798160 Merge branch 'chalker/fix-comma' of git://github.com/ChALkeR/ajv into ChALkeR...
• a3c7eba Merge branch 'refactor-opt-object-type' of github.com:b4h0-c4t/ajv into refac...
• Additional commits viewable in compare view

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