Bump ajv and chai-json-schema-ajv

[dependabot[bot]]

Removes ajv. It's no longer used after updating ancestor dependency chai-json-schema-ajv. These dependencies need to be updated together.

Removes ajv

Updates chai-json-schema-ajv from 2.0.1 to 5.2.4

Commits

• ba98598 5.2.4
• 5e4b544 chore: up dev deps to date
• 2986e27 test: add test cases for ajv/dist/2019, 2020
• 1a6e245 fix: don't check configs.ajv, trust them :)
• 04f0fcd Merge pull request #48 from up9cloud/revert-8-dependabot/npm_and_yarn/clear-m...
• 427a684 Revert "Bump clear-module from 2.1.0 to 4.1.1"
• 220ee7f Merge pull request #8 from up9cloud/dependabot/npm_and_yarn/clear-module-4.1.1
• 5085364 🤖ci: deploy after all tests passed
• 87dddf6 5.2.3
• 75d353d 🤖ci: drop support nodejs 6, 8
• Additional commits viewable in compare view

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