Bump ava from 2.1.0 to 2.2.0

Bumps [ava](https://github.com/avajs/ava) from 2.1.0 to 2.2.0.
- [Release notes](https://github.com/avajs/ava/releases)
- [Commits](avajs/ava@v2.1.0...v2.2.0)

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

package.json

@@ -31,7 +31,7 @@
   },
   "homepage": "https://github.com/dirigeants/docsgen#readme",
   "devDependencies": {
-    "ava": "^2.1.0",
+    "ava": "^2.2.0",
     "eslint": "^6.0.1",
     "eslint-config-klasa": "github:dirigeants/klasa-lint"
   },