- Linting (JSDoc): Update per newly enforced require-returns; avoid Closure syntax

- Docs (JSDoc): Prefer `void`
- npm: Update devDeps

package.json

@@ -86,11 +86,11 @@
     "axe-testcafe": "^1.1.0",
     "babel-plugin-transform-object-rest-spread": "^7.0.0-beta.3",
     "eslint": "5.16.0",
-    "eslint-config-ash-nazg": "1.0.2",
+    "eslint-config-ash-nazg": "2.0.0",
     "eslint-config-standard": "12.0.0",
     "eslint-plugin-compat": "^3.1.1",
     "eslint-plugin-eslint-comments": "^3.1.1",
-    "eslint-plugin-import": "2.16.0",
+    "eslint-plugin-import": "2.17.1",
     "eslint-plugin-jsdoc": "^4.8.3",
     "eslint-plugin-markdown": "^1.0.0",
     "eslint-plugin-no-use-extend-native": "^0.4.0",