fix(deps): update dependency ajv to v6.12.6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ajv (source)	^6.10.2 -> 6.12.6

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Release Notes

ajv-validator/ajv

### [`v6.12.6`](https://togithub.com/ajv-validator/ajv/releases/v6.12.6) [Compare Source](https://togithub.com/ajv-validator/ajv/compare/v6.12.5...v6.12.6) Fix performance issue of "url" format. ### [`v6.12.5`](https://togithub.com/ajv-validator/ajv/releases/v6.12.5) [Compare Source](https://togithub.com/ajv-validator/ajv/compare/v6.12.4...v6.12.5) Fix uri scheme validation ([@​ChALkeR](https://togithub.com/ChALkeR)). Fix boolean schemas with strictKeywords option ([#​1270](https://togithub.com/ajv-validator/ajv/issues/1270)) ### [`v6.12.4`](https://togithub.com/ajv-validator/ajv/releases/v6.12.4) [Compare Source](https://togithub.com/ajv-validator/ajv/compare/v6.12.3...v6.12.4) Fix: coercion of one-item arrays to scalar that should fail validation ([failing example](https://runkit.com/esp/5f3672ba2f6642001ae27411)). ### [`v6.12.3`](https://togithub.com/ajv-validator/ajv/releases/v6.12.3) [Compare Source](https://togithub.com/ajv-validator/ajv/compare/v6.12.2...v6.12.3) Pass schema object to processCode function Option for strictNumbers ([@​issacgerges](https://togithub.com/issacgerges), [#​1128](https://togithub.com/ajv-validator/ajv/issues/1128)) Fixed vulnerability related to untrusted schemas ([CVE-2020-15366](https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=CVE-2020-15366)) ### [`v6.12.2`](https://togithub.com/ajv-validator/ajv/releases/v6.12.2) [Compare Source](https://togithub.com/ajv-validator/ajv/compare/v6.12.1...v6.12.2) Removed post-install script ### [`v6.12.1`](https://togithub.com/ajv-validator/ajv/releases/v6.12.1) [Compare Source](https://togithub.com/ajv-validator/ajv/compare/v6.12.0...v6.12.1) Docs and dependency updates

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