Bump @ava/babel from 1.0.1 to 2.0.0

Bumps [@ava/babel](https://github.com/avajs/babel) from 1.0.1 to 2.0.0.
- [Release notes](https://github.com/avajs/babel/releases)
- [Commits](avajs/babel@v1.0.1...v2.0.0)

---
updated-dependencies:
- dependency-name: "@ava/babel"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -22,7 +22,7 @@
     "webextension-polyfill": "^0.8.0"
   },
   "devDependencies": {
-    "@ava/babel": "^1.0.1",
+    "@ava/babel": "^2.0.0",
     "@babel/core": "^7.8.6",
     "@babel/plugin-syntax-dynamic-import": "^7.8.3",
     "@babel/plugin-transform-modules-commonjs": "^7.8.3",