Bump to ava 3 and upgrade its babel usage as needed

package.json

@@ -12,14 +12,14 @@
     "lodash.isequal": "^4.5.0"
   },
   "devDependencies": {
+    "@ava/babel": "^1.0.1",
     "@babel/core": "^7.5.5",
-    "@babel/register": "^7.5.5",
     "@rollup/plugin-commonjs": "^11.0.1",
-    "ava": "^2.2.0",
-    "husky": "^3.0.2",
+    "ava": "^3.3.0",
+    "husky": "^4.2.1",
     "postcss-preset-env": "^6.7.0",
     "prettier": "^1.18.2",
-    "pretty-quick": "^1.11.1",
+    "pretty-quick": "^2.0.1",
     "release-it": "^12.3.5",
     "rollup": "^1.19.3",
     "rollup-plugin-filesize": "^6.1.1",
@@ -67,14 +67,11 @@
     "singleQuote": true,
     "trailingComma": "es5"
   },
-  "babel": {
-    "presets": [
-      "@ava/stage-4"
-    ]
-  },
   "ava": {
-    "require": [
-      "@babel/register"
-    ]
+    "babel": {
+      "compileAsTests": [
+        "src/**/*"
+      ]
+    }
   }
 }