Dev dependencies updated

Author: Niels Søholm

package.json

@@ -43,14 +43,14 @@
     "pg": "7.4.1"
   },
   "devDependencies": {
-    "ava": "^0.24.0",
+    "ava": "^2.2.0",
     "coveralls": "^3.0.0",
     "eslint-config-xo-lukechilds": "^1.0.0",
     "keyv": "*",
     "@keyv/test-suite": "*",
-    "nyc": "^11.0.3",
+    "nyc": "^14.1.1",
     "requirable": "^1.0.4",
     "this": "^1.0.2",
-    "xo": "^0.19.0"
+    "xo": "^0.24.0"
   }
 }