Bump ajv from 6.11.0 to 6.12.6

Bumps [ajv](https://github.com/ajv-validator/ajv) from 6.11.0 to 6.12.6.
- [Release notes](https://github.com/ajv-validator/ajv/releases)
- [Commits](https://github.com/ajv-validator/ajv/compare/v6.11.0...v6.12.6)

---
updated-dependencies:
- dependency-name: ajv
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

package-lock.json

@@ -302,9 +302,9 @@
       "optional": true
     },
     "ajv": {
-      "version": "6.11.0",
+      "version": "6.12.6",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.11.0.tgz",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
-      "integrity": "sha512-nCprB/0syFYy9fVYU1ox1l2KN8S9I+tziH8D4zdZuLT3N6RMlGSGt5FSTpAiHB/Whv8Qs1cWHma1aMKZyaHRKA==",
+      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
       "requires": {
         "fast-deep-equal": "^3.1.1",
         "fast-json-stable-stringify": "^2.0.0",
@@ -5383,20 +5383,6 @@
         "@types/json-schema": "^7.0.4",
         "ajv": "^6.12.2",
         "ajv-keywords": "^3.4.1"
-      },
-      "dependencies": {
-        "ajv": {
-          "version": "6.12.3",
-          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.3.tgz",
-          "integrity": "sha512-4K0cK3L1hsqk9xIb2z9vs/XU+PGJZ9PNpJRDS9YLzmNdX6jmVPfamLvTJr0aDAusnHyCHO6MjzlkAsgtqp9teA==",
-          "dev": true,
-          "requires": {
-            "fast-deep-equal": "^3.1.1",
-            "fast-json-stable-stringify": "^2.0.0",
-            "json-schema-traverse": "^0.4.1",
-            "uri-js": "^4.2.2"
-          }
-        }
       }
     },
     "select-hose": {